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Medical Dictionary


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grinding (grind′ing)
SYN: abrasion (3) . selective g. the modification of the occlusal forms of teeth by g. according to a plan or by g. at selected places marked by articulating ribbon or paper.

grinding-in
A term used to denote the act of correcting occlusal disharmonies by grinding the natural or artificial teeth.

grip
1. SYN: influenza. 2. See grasp. devil g. SYN: epidemic pleurodynia.

grippe (grip)
SYN: influenza. [Fr. gripper, to seize]

griseofulvin (gris′e-o-ful′vin)
A fungistatic antibiotic produced by Penicillium g., P. patulum, and P. janczewskii; used in the systemic treatment of superficial fungal infections caused by the dermatophytes Microsporum, Trichophyton, and Epidermophyton; inhibits microtubule assembly.

griseus (gris′e-us)
SYN: gray. [L.]

Grisonella ratellina (gri-so-nel′a ra-te-li′na)
A South American weasel, a reservoir host of Trypanosoma cruzi.

gristle (gris′l)
SYN: cartilage. [A.S.]

Gritti
Rocco, Italian surgeon, 1828–1920. See G. operation, G.-Stokes amputation.

Grocco
Pietro, Italian physician, 1857–1916. See G. sign, G. triangle, Orsi-G. method.

Grocott-Gomori methenamine-silver stain
See under stain.

Groenouw
Arthur, German ophthalmologist, 1862–1945. See G. corneal dystrophy.

groin (groyn) [TA]
1. Topographic area of the inferior abdomen related to the inguinal canal, lateral to the pubic region. SYN: inguen [TA] , inguinal region&star, regio inguinalis&star, iliac region. 2. Sometimes used to indicate just the crease in the junction of the thigh with the trunk.

Grönblad
Ester E., Swedish ophthalmologist, *1898. See G.-Strandberg syndrome.

groove (groov) [TA]
A narrow, elongate depression or furrow on any surface. SEE ALSO: sulcus. alveolobuccal g. the upper and lower half of the buccal vestibule on each side. SYN: alveolobuccal sulcus, gingivobuccal g., gingivobuccal sulcus. alveololabial g. 1. the upper and lower half of the labial vestibule; 2. in the embryo, the g. formed by the deepening of the labial sulcus; its inner wall becomes incorporated with the alveolar process of the mandible or the maxilla, and its outer wall with the lips and cheeks. SYN: alveololabial sulcus, gingivolabial g., gingivolabial sulcus. alveololingual g. 1. that part of the oral cavity proper, on each side of the frenulum linguae, between the tongue and the mandibular alveolar process or ridge; 2. in the embryo, the g. on each side between the lingual primordium and the alveolar elevations of the mandible. SYN: alveololingual sulcus, gingivolingual g., gingivolingual sulcus. ampullary g. [TA] the g. on the external surface of the ampulla of each semicircular duct where the nerve enters the ampullary crest. SYN: sulcus ampullaris [TA] , ampullary sulcus. anterior auricular g. SYN: anterior notch of auricle. anterior intermediate g. SYN: anterior intermediate sulcus. anterior interventricular g. SYN: anterior interventricular sulcus. anterolateral g. SYN: anterolateral sulcus. anteromedian g. 1. SYN: anterior median fissure of medulla oblongata. 2. SYN: anterior median fissure of spinal cord. g. for arch of aorta a broad, deep sulcus arching superiorly over the hilus on the mediastinal surface of the left lung formed in the cadaver as a result of the aortic arch impressing or indenting the lung. arterial grooves [TA] branching grooves on the interior surface of the cranial vault in which the meningeal arteries course, the most prominent of which are related to branches of the middle meningeal artery. SYN: sulci arteriosi [TA] . atrioventricular g. SYN: coronary sulcus. g. for auditory tube SYN: sulcus for pharyngotympanic tube. auriculoventricular g. SYN: coronary sulcus. bicipital g. intertubercular sulcus. branchial g. an external embryonic g. between contiguous branchial arches. SEE ALSO: branchial clefts, under cleft. carotid g. SYN: cavernous g.. carpal g. [TA] the concavity on the anterior surface of the arch formed by the carpal bones. SYN: sulcus carpi [TA] , carpal canal (2) . cavernous g. [TA] the g. on the body of the sphenoid bone in which the internal carotid artery lies in its course through the cavernous sinus. SYN: sulcus caroticus [TA] , carotid g., carotid sulcus. chiasmatic g. SYN: prechiasmatic sulcus. coronary g. SYN: coronary sulcus. costal g. [TA] a g. in the lower inner border of the rib, lodging the intercostal vessels and nerve. SYN: sulcus costae [TA] , subcostal g.. g. of crus of helix [TA] a transverse fissure on the cranial surface of the auricle corresponding to the crus of the helix. SYN: sulcus cruris helicis [TA] . dental g. a transitory depression in the gingival surface of the embryonic jaw along the line of ingrowth of the dental lamina. g. for the descending aorta a broad, deep, vertical sulcus immediately posterior to the hilus on the mediastinal surface of the cadaveric left lung, formed as a result of the descending aorta impressing or indenting the lung. developmental grooves fine lines found in the enamel of a tooth that mark the junction of the lobes of the crown in its development. SYN: developmental lines. digastric g. SYN: mastoid notch. ethmoidal g. [TA] a g. on the inner surface of each nasal bone, lodging the external nasal branch of the anterior ethmoid nerve. SYN: sulcus ethmoidalis [TA] . g. of first rib for subclavian artery [TA] a g. immediately posterior to the scalene tubercle on the upper surface of the first rib across which the subclavian artery passes. SYN: sulcus arteriae subclaviae costae primae [TA] , sulcus costae arteriae subclaviae. frontal grooves See inferior frontal sulcus, middle frontal sulcus, superior frontal sulcus. gingival g. SYN: gingival sulcus. gingivobuccal g. SYN: alveolobuccal g.. gingivolabial g. SYN: alveololabial g.. gingivolingual g. SYN: alveololingual g.. greater palatine g. [TA] a g. on both the body of the maxilla and the perpendicular plate of the palatine bone; when the bones are articulated the grooves form the greater palatine canal. SYN: sulcus palatinus major [TA] , pterygopalatine g., sulcus for greater palatine nerve, sulcus pterygopalatinus. g. for greater petrosal nerve [TA] the g. on the anterior surface of the petrous part of the temporal bone that lodges the greater petrosal nerve. SYN: sulcus nervi petrosi majoris [TA] . Harrison g. a deformity of the ribs which results from the pull of the diaphragm on ribs weakened by rickets or other softening of the bone. inferior petrosal g. SYN: g. for inferior petrosal sinus. g. for inferior petrosal sinus [TA] a g. lodging the inferior petrosal sinus, formed by union of similarly named grooves in the petrous part of the temporal bone and the basilar part of the occipital bone. SYN: sulcus sinus petrosi inferioris [TA] , inferior petrosal g., inferior petrosal sulcus. g. for inferior venae cava SYN: sulcus for vena cava. infraorbital g. [TA] a gradually deepening g. on the orbital surface of the maxilla, which leads to the infraorbital canal. SYN: sulcus infraorbitalis [TA] . interosseous g. 1. SYN: calcaneal sulcus. 2. SYN: sulcus tali. interosseous g. of calcaneus SYN: calcaneal sulcus. interosseous g. of talus SYN: sulcus tali. intertubercular g. [TA] SYN: intertubercular sulcus. interventricular grooves anterior interventricular sulcus, posterior interventricular sulcus. lacrimal g. [TA] (2) the g. in the nasal surface of the maxilla which, together with the lacrimal bone, forms the fossa for the lacrimal sac. SYN: sulcus lacrimalis [TA] . laryngotracheal g. the depression in the floor of the caudal end of the pharynx, continued downward on the ventral wall of the foregut; from it are developed the lower part of the larynx and the trachea, bronchi, and lungs. SYN: tracheobronchial g.. lateral bicipital g. [TA] the g. along the lateral side of the arm separating the biceps brachii and brachialis muscles. SYN: sulcus bicipitalis lateralis [TA] , sulcus bicipitalis radialis&star. g. of lesser petrosal nerve [TA] the g. on the anterior surface of the petrous part of the temporal bone that accommodates the lesser petrosal nerve in its course to the otic ganglion. SYN: sulcus nervi petrosi minoris [TA] . linguogingival g. a g. separating the embryonic mandibular portion of the tongue from the remainder of the mandibular process. Lucas g. SYN: stria spinosa. g. of lung for subclavian artery a sulcus on the surface of the cadaveric lung just below the apex, corresponding to the course of the subclavian artery. SYN: sulcus subclavius. major g. in a detailed analysis of DNA structure, there are two types of grooves that can be seen; the major g. has the nitrogen and oxygen atoms of the base pairs pointing inward toward the helical axis, while in the minor g., the nitrogen and oxygen atoms point outwards; important because the major g. is more dependent on base composition and may be the site for protein recognition of specific DNA sequences or regions. malleolar g. [TA] a broad g. on the posterior surface of the medial malleolus, through which the tendon of the tibialis posterior muscle runs. SYN: sulcus malleolaris [TA] , g. for tibialis posterior tendon, malleolar sulcus. mastoid g. SYN: mastoid notch. medial bicipital g. [TA] the g. along the medial side of the arm separating the biceps brachii and brachialis muscles. SYN: sulcus bicipitalis medialis [TA] , sulcus bicipitalis ulnaris&star. median g. of tongue SYN: median sulcus of tongue. medullary g. SYN: neural g.. middle meningeal artery g. a narrow g. on the inner table of the calvarium, seen on lateral radiographs as a thin dark line, which may be mistaken for a skull fracture. See sulci arteriosi, under sulcus. g. for middle temporal artery [TA] a vertical g. located above the external acoustic meatus on the external surface of the squamous part of the temporal bone. SYN: sulcus arteriae temporalis mediae [TA] , sulcus for middle temporal artery. minor g. major g.. musculospiral g. SYN: radial g.. mylohyoid g. [TA] a g. on the medial surface of the ramus of the mandible beginning at the lingula; it lodges the mylohyoid artery and nerve. SYN: sulcus mylohyoideus [TA] , mylohyoid fossa. g. of nail matrix SYN: sulcus matricis unguis. nasolabial g. SYN: nasolabial sulcus. nasopalatine g. a g. on the vomer lodging the nasopalatine nerve. nasopharyngeal g. an indistinct line marking the boundary between the nasal cavities and the nasopharynx. neural g. the gutterlike g. formed in the midline of the embryo's dorsal surface by the progressive elevation of the lateral margins of the neural plate; the ultimate dorsal fusion of the margins results in the formation of the neural tube. SYN: medullary g.. obturator g. [TA] a deep g. on the inner surface of the superior ramus of the pubis. SYN: sulcus obturatorius [TA] . occipital g. [TA] a narrow g. medial to the mastoid notch of the temporal bone that lodges the occipital artery. SYN: sulcus arteriae occipitalis [TA] , sulcus of occipital artery. olfactory g. SYN: olfactory sulcus. olfactory g. of nasal cavity [TA] the narrow g. in the nasal cavity above the agger nasi that leads from the atrium to the olfactory area. SYN: sulcus olfactorius cavi nasi [TA] , olfactory sulcus of nasal cavity. optic g. SYN: prechiasmatic sulcus. palatine grooves [TA] a number of grooves on the lower surface of the palatine process of the maxilla in which the palatine vessels and nerves lie. SYN: sulci palatini [TA] . palatovaginal g. [TA] a furrow on the inferior aspect of the vaginal process of the sphenoid bone that is bridged below by the sphenoidal process of the palatine bone to form the palatovaginal canal. SYN: sulcus palatovaginalis [TA] . paraglenoid g. SYN: preauricular g.. pharyngeal grooves embryonic endodermal or ectodermal grooves between successive pharyngeal arches. pharyngotympanic g. SYN: sulcus for pharyngotympanic tube. pontomedullary g. SYN medullopontine sulcus [TA]. popliteal g. SYN: g. for popliteus. g. for popliteus [TA] a g. on the lateral condyle of the femur between the epicondyle and the articular margin. Its anterior end gives origin to the popliteus muscle; its posterior end lodges the tendon of the muscle when the knee is fully flexed. SYN: sulcus popliteus [TA] , popliteal g.. posterior auricular g. [TA] the sulcus between the antitragus and cauda helicis overlying the antitragicohelicine fissure. SYN: sulcus posterior auriculae [TA] . posterior intermediate g. SYN: posterior intermediate sulcus. posterior interventricular g. SYN: posterior interventricular sulcus. posterolateral g. SYN: posterolateral sulcus. preauricular g. a g. on the pelvic surface of the ilium just lateral to the auricular surface; it is more pronounced in the female. SYN: paraglenoid g., paraglenoid sulcus, preauricular sulcus, sulcus paraglenoidalis. primary labial g. SYN: labial sulcus. primitive g. the median depression in the primitive streak flanked by the primitive ridges. SYN: primitive furrow. g. of promontory of labyrinthine wall of tympanic cavity [TA] a narrow branched g. running vertically over the surface of the promontory in the middle ear, lodging the tympanic plexus. SYN: sulcus promontorii cavitatis tympanicae [TA] , sulcus of promontory of tympanic cavity. g. for pterygoid hamulus [TA] a g. at the base of the pterygoid hamulus that forms a pulley for the tendon of the tensor veli palatini muscle. SYN: sulcus hamuli pterygoidei [TA] , sulcus of pterygoid hamulus. g. of pterygoid hamulus [TA] the notch or fissure between the tuberosity of the maxilla and the pterygoid hamulus of the sphenoid bone. SYN: hamular notch, pterygomaxillary notch. pterygopalatine g. SYN: greater palatine g.. pulmonary g. [TA] the deep recess on either side of the vertebral column formed by the posterior sweep of the curvature of the ribs. SYN: sulcus pulmonalis [TA] , paravertebral gutter, pulmonary sulcus. radial g. [TA] the shallow g. that passes around the shaft of the humerus; it lodges the radial nerve and deep brachial artery. SYN: sulcus nervi radialis [TA] , g. for radial nerve&star, musculospiral g., spiral g.. g. for radial nerve radial g.. retention g. one of the grooves forming opposing vertical constrictions in a tooth to aid in retention of a dental restoration. rhombic grooves seven pairs of transverse furrows in the floor of the embryonic hindbrain. sagittal g. SYN: g. for superior sagittal sinus. Sibson g. a g. occasionally seen on the outer side of the thorax formed by the prominent lower border of the pectoralis major muscle. sigmoid g. SYN: g. for sigmoid sinus. g. for sigmoid sinus [TA] a broad g. in the posterior cranial fossa, first situated on the lateral portion of the occipital bone, then curving around the jugular process on to the mastoid portion of the temporal bone, and finally turning sharply on the posterior inferior angle of the parietal bone and becoming continuous with the transverse g.; it lodges the transverse sinus. SYN: sulcus sinus sigmoidei [TA] , sigmoid fossa, sigmoid g., sigmoid sulcus. skin grooves SYN: skin sulci, under sulcus. g. for spinal nerve [TA] the laterally directed g. on the superior surface of the transverse processes of typical cervical vertebrae between the anterior and posterior tubercles along which the emerging spinal nerve passes. SYN: sulcus nervi spinalis [TA] . spiral g. SYN: radial g.. subclavian g. [TA] a g. on the inferior surface of the body of the clavicle to which is attached the subclavius muscle. SYN: sulcus musculi subclavii [TA] , g. for subclavius&star, subclavian sulcus, sulcus subclavianus. g. for subclavian vein [TA] a g. just anterior to the scalene tubercle of the first rib marking the course of the subclavian vein across the rib. SYN: sulcus venae subclaviae [TA] . g. for subclavius subclavian g.. subcostal g. SYN: costal g.. g. for superior petrosal sinus [TA] a g. on the crest of the petrous portion of the temporal bone in which rests the superior petrosal sinus. SYN: sulcus sinus petrosi superioris [TA] , superior petrosal sulcus. g. for superior sagittal sinus the g. in the midline of the inner table of the calvaria lodging the superior sagittal sinus. SYN: sagittal g., sagittal sulcus, sulcus sinus sagittalis superioris, superior longitudinal sulcus. g. for superior vena cava a g. on the surface of the cadaveric right lung, above the hilum, in which runs the superior vena cava. SYN: sulcus venae cavae cranialis. supplemental g. a curvilinear depression normally found on each side of a triangular ridge (crista triangularis). supra-acetabular g. [TA] a g., posterosuperior to the acetabulum, that is the attachment for the reflected head of the rectus femoris muscle. SYN: sulcus supraacetabularis [TA] , supraacetabular sulcus. g. for tendon of fibularis longus [TA] 1. the g. below the peroneal trochlea of the calcaneus; 2. the g. distal to the tuberosity of the cuboid bone. SYN: sulcus tendinis musculi fibularis longi [TA] , g. for tendon of peroneus longus&star, sulcus tendinis musculi peronei longi (1) &star. g. for tendon of flexor hallucis longus [TA] a vertical sulcus on the posterior process of the talus continuous with another g. (of the same name) on the underside of the sustentaculum tali of the calcaneus. SYN: sulcus tendinis musculi flexoris hallucis longi [TA] . g. for tendon of peroneus longus g. for tendon of fibularis longus. g. for tibialis posterior tendon SYN: malleolar g.. tracheobronchial g. SYN: laryngotracheal g.. transverse anthelicine g. a deep g. on the cranial surface of the auricle separating the eminences of the triangular fossa and of the concha. SYN: sulcus anthelicis transversus. transverse nasal g. SYN: stria nasi transversa. g. for transverse sinus [TA] the g. on the inner surface of the occipital bone marking the course of the transverse sinus; the tentorium is attached to its margins. SYN: sulcus sinus transversi [TA] , sulcus for transverse sinus. tympanic g. SYN: tympanic sulcus. g. for ulnar nerve [TA] a furrow on the posterior surface of the medial epicondyle of the humerus, lodging the ulnar nerve. SYN: sulcus nervi ulnaris [TA] . urethral g. the g. on the ventral surface of the embryonic penis which ultimately is closed to form the penile portion of the urethra. venous grooves [TA] grooves occasionally found on the internal surface of the parietal bone, in which veins lie. SYN: sulci venosi [TA] . vertebral g. the depression bounded by the spinous processes and laminae of the vertebrae, in which lie the deep muscles of the back. g. for vertebral artery [TA] the sulcus on the superior aspect of the posterior arch of the atlas that transmits the vertebral artery medially toward the foramen magnum. SYN: sulcus arteriae vertebralis [TA] , sulcus for vertebral artery. vomeral g. SYN: vomerine g.. vomerine g. [TA] the g. on the anterior border of the vomer that receives the septal cartilage. SYN: sulcus vomeris [TA] , sulcus vomeralis, vomeral g., vomeral sulcus. vomerovaginal g. [TA] a sulcus on the inferior aspect of the vaginal process of the sphenoid bone that, together with ala of the vomer, forms the vomerovaginal canal. SYN: sulcus vomerovaginalis [TA] .

Gross
Ludwik, U.S. oncologist, *1904. See G. virus, G. leukemia virus.

gross (gros)
Coarse or large; large enough to be visible to the naked eye; macroscopic. [L. grossus, thick]

group (groop)
1. A number of similar or related objects. 2. In chemistry, a radical. For individual chemical groups, see the specific name. blood g. blood g.. characterizing g. a g. of atoms in a molecule that distinguishes the class of substances in which it occurs from all other classes; thus carbonyl (CO) is the characterizing g. of ketones; COOH, of organic acids, etc. connective tissue g. a collective name for mucous tissue, dentin, bone, cartilage, and ordinary connective tissue, all derived from the mesenchyme. control g. a g. of subjects participating in the same experiment as another g. of subjects, but which is not exposed to the variable under investigation. SEE ALSO: experimental g.. cytophil g. the part of an antibody that binds it to the cell. determinant g. SYN: antigenic determinant. diagnosis-related g. (DRG) a scheme for billing for medical and especially hospital services by combining diseases into groups according to the resources needed for care, arranged by diagnostic category. A dollar value is assigned to each g. as the basis of payment for all cases in that g., without regard to the actual cost of care or duration of hospitalization of any individual case, as a mechanism to motivate health-care providers to economize. encounter g. a form of psychological sensitivity training that emphasizes the experiencing of individual relationships within the g. and minimizes intellectual and didactic input; the g. focuses on the present rather than concerning itself with the past or outside problems of its members. SEE ALSO: sensitivity training g.. experimental g. a g. of subjects exposed to the variable of an experiment, as opposed to the control g.. functional g. function (4) . HACEK g. a g. of Gram-negative bacteria that includes Haemophilus spp., Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella kingae. Bacteria in this g. have in common a culture requirement of an enhanced carbon dioxide atmosphere and ability to infect human heart valves. linkage g. a set of two or more loci that have been shown by linkage analysis to be physically close in the genome but that have not yet been assigned to specific chromosomes. It is rapidly becoming an outmoded term. matched groups a method of experimental control in which subjects in one g. are matched on a one-to-one basis with subjects in other groups concerning all organism variables ( e.g., age, sex, height, weight) which the experimenter believes could influence the variable being investigated. prosthetic g. a non-amino acid compound attached to a protein, often in a reversible fashion, that confers new properties upon the conjugated protein thus produced. SEE ALSO: coenzyme. sensitivity training g. a g., more popular in the 1960s and 1970s, in which members seek to develop self-awareness and an understanding of g. processes rather than to obtain therapy for an emotional disturbance. SEE ALSO: encounter g., personal growth laboratory. symptom g. syndrome, complex (1) . T g. abbreviation for training g.. therapeutic g. any g. of patients meeting together for mutual psychotherapeutic, personal development, and life change goals. training g. (T g.) any g. emphasizing training in self-awareness and g. dynamics. See sensitivity training g..

Grover
Ralph W., U.S. dermatologist, *1920. See G. disease.

growth (groth)
The increase in size of a living being or any of its parts occurring in the process of development. accretionary g. g. by an increase of intercellular material. appositional g. g. accomplished by the addition of new layers on those previously formed; e.g., the addition of lamellae in the formation of bone; it is the characteristic method of g. when rigid materials are involved. auxetic g. g. by increase in the size of component cells. SYN: intussusceptive g.. bacterial g. g. of a bacterial culture either by increase in cell material or cell number. differential g. different rates of g. in associated tissues or structures; used especially in embryology when the differences in g. rates result in changing the original proportions or relations. exponential g. logarithmic phase. interstitial g. g. from a number of different centers within an area; in contrast with appositional g., it can occur only when the materials involved are nonrigid. intussusceptive g. SYN: auxetic g.. multiplicative g. g. by an increase in the number of cells. new g. SYN: neoplasm.

grub (grub)
Wormlike larva or maggot of certain insects, particularly in the orders Coleoptera, Diptera, and Hymenoptera, and the genus Hypoderma.

Gruber
George B., German physician, 1884–1977. See Meckel-G. syndrome, Martin-G. anastomosis.

Gruber
Josef, Austrian otologist, 1827–1900. See G. method.

Gruber
Max von, German hygienist, 1853–1927. See G. reaction, G.-Widal reaction.

Gruber
Wenzel (Wenaslaus) L., Russian anatomist, 1814–1890. See G. cul-de-sac, G.-Landzert fossa.

gruel (groo′el)
A semiliquid food of oatmeal or other cereal boiled in water; thin porridge. [thru O. Fr., fr. Mediev. L. grutum, meal]

grumous (groo′mus)
Thick and lumpy, as clotting blood. [L. grumus, a little heap]

Grunert spur
See under spur.

Grunstein-Hogness assay
See under assay.

Grünwald
See May-G. stain.

Grütz
O., German dermatologist, *1886. See Bürger-G. syndrome.

Grynfeltt
Joseph C., French surgeon, 1840–1913. See G. triangle.

gryochrome (gri′o-krom)
A term applied by Nissl to nerve cells in which the stainable portion is present in the form of minute granules without definite arrangement. [G. gry, something insignificant, + chroma, color]

gryposis (gri-po′sis)
An abnormal curvature. [G. grypos, hooked, + -osis, condition]

GSH
Abbreviation for glutathione.

GSR
Abbreviation for galvanic skin response.

GSSG
Abbreviation for glutathione disulfide.

G-strophanthin
See ouabain.

gt.
Abbreviation for gutta.

g-tolerance
The tolerance of a person or a piece of equipment to forces that develop as a result of acceleration or deceleration.

GTP
Abbreviation for guanosine 5′-triphosphate.

gtt.
Abbreviation for guttae.

GU
Abbreviation for genitourinary.

Gua
Abbreviation for guanine.

guaiac (gwi′ak)
The resin of Guaiacum officinale or G. sanctum (family Zygophyllaceae); a nauseant, diaphoretic, stimulant, and reagent in testing for occult blood. SYN: g. gum. [Sp. guayaco, imitating the native Carib name]

guaiacin (gwi′a-sin)
Guaiac saponin, a constituent of guiac used as a reagent for oxidases, with which it gives a blue color.

guaiacol (gwi′a-kol)
Has been used as an expectorant and intestinal disinfectant; also available as g. carbonate. g. glyceryl ether SYN: guaifenesin. g. phosphate phosphoric guaiacyl ether, a white crystalline powder, insoluble in water; used as an intestinal antiseptic and in fever.

guaifenesin (gwi-fen′e-sin)
An expectorant that allegedly reduces the viscosity of sputum, thus facilitating its elimination. SYN: glyceryl guaiacolate, guaiacol glyceryl ether.

guanabenz acetate (gwahn-a-benz)
A centrally acting antiadrenergic antihypertensive similar in action to clonidine.

guanacline sulfate (gwahn′a-klen)
An antihypertensive.

guanadrel sulfate (gwahn′a-drel)
An antihypertensive drug similar in action to guanethidine.

guanase (gwahn′as)
SYN: guanine deaminase.




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