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Medical Dictionary - Dictionary of Medicine and Human Biology

Medical Dictionary


teething (te′thing)
Eruption or “cutting” of the teeth, especially of the deciduous teeth. SYN: odontiasis.

teflurane (tef′loo-ran)
A nonexplosive and nonflammable inhalation anesthetic of moderate potency.

tegmen, gen. tegminis, pl .tegmina (teg′men, -mi-nis, -mi-na)
A structure that covers or roofs over a part. [L. a covering, fr. tego, to cover] t. cruris old term for tegmentum mesencephali. t. mastoideum the lamina of bone roofing over the mastoid cells. t. tympani [TA] the roof of the middle ear, formed by the thinned anterior surface of the petrous portion of the temporal bone. Its anterior edge is inserted into the petrosquamous fissure so that it can be seen as a wedge of bone subdividing that fissure into a squamotympanic and a petrotympanic fissure. SYN: roof of tympanum. t. ventriculi quarti [TA] roof of fourth ventricle, formed in its upper part by the superior medullary velum stretching between the two brachia conjunctiva (superior cerebellar peduncles) and in its lower part by the inferior medullary velum composed of the choroid membrane and choroid plexus of the fourth ventricle. SYN: roof of fourth ventricle [TA] .

tegmental (teg-men′tal)
Relating to, characteristic of, or placed or oriented toward a tegmentum or tegmen.

tegmentotomy (teg-men-tot′o-me)
Production of lesions in the reticular formation of the midbrain tegmentum. [tegmentum + G. tome, incision]

tegmentum, pl .tegmenta (teg-men′tum, -ta)
1. A covering structure. 2. SYN: mesencephalic t.. [L. covering structure, fr. tego, to cover] t. mesencephali [TA] SYN: mesencephalic t.. mesencephalic t. that major part of the substance of the mesencephalon or midbrain that extends from the substantia nigra to the level of the cerebral aqueduct. SYN: t. mesencephali [TA] , t. of midbrain [TA] , midbrain t., t. (2) . midbrain t. SYN: mesencephalic t.. t. of midbrain [TA] SYN: mesencephalic t.. t. of pons [TA] SYN: dorsal part of pons. t. pontis [TA] SYN: dorsal part of pons. t. rhombencephali SYN: rhombencephalic t.. rhombencephalic t. the portion of the pons continuous with the mesencephalic t.; it consists of reticular formation, tracts, and cranial nerve nuclei, and forms the dorsal part of the pons (pars dorsalis pontis). SYN: t. of rhombencephalon, t. rhombencephali. t. of rhombencephalon SYN: rhombencephalic t..

tegument (teg′u-ment)
1. SYN: integument. 2. SYN: integument (2) . [L. tegumentum, a collat. form of tegmentum]

tegumental, tegumentary (teg-u-men′tal, teg-u-men′ta-re)
Relating to the integument.

Ludwig, German histologist, 1823–1895. See T. crystals, under crystal.

teichoic acids (ti-ko′ik)
One of two classes (the other being the muramic acids or mucopeptides) of polymers constituting the cell walls of Gram-positive bacteria, but also found intracellularly; linear polymers of a polyol (ribitol phosphate or glycerol phosphate) carrying d-alanyl residues esterified to OH groups and glycosidically linked sugars.

teichopsia (ti-kop′se-a)
The jagged, shimmering visual sensation resembling the fortifications of a walled medieval town; the scintillating scotoma of migraine. [G. teichos, wall, + opsis, vision]

tel-, tele-, telo-
Distance, end, other end. [G. tele, distant, telos, end]

tela, gen. and pl. telae (te′la, te′le)
1. Any thin weblike structure. 2. A tissue; especially one of delicate formation. [L. a web] t. choroidea [TA] that portion of the pia mater that covers the ependymal roof or, in the case of the lateral ventricle, medial wall of a cerebral ventricle. SYN: choroid membrane [TA] . t. choroidea of fourth ventricle [TA] the sheet of pia mater covering the lower part of the ependymal roof of the fourth ventricle. SYN: t. choroidea ventriculi quarti [TA] , t. choroidea inferior. t. choroidea inferior SYN: t. choroidea of fourth ventricle. t. choroidea superior SYN: t. choroidea of third ventricle. t. choroidea of third ventricle a double fold of pia mater, enclosing subarachnoid trabeculae, between the fornix above and the epithelial roof of the third ventricle and the thalami below; at each lateral margin is a vascular fringe projecting into the choroidal fissure of the lateral ventricle; on its undersurface are several small vascular projections filling the folds of the ependymal roof of the third ventricle. SYN: t. choroidea ventriculi tertii [TA] , t. choroidea superior, triangular lamella, velum interpositum, velum triangulare. t. choroidea ventriculi quarti [TA] SYN: t. choroidea of fourth ventricle. t. choroidea ventriculi tertii [TA] SYN: t. choroidea of third ventricle. t. conjunctiva SYN: connective tissue. t. elastica SYN: elastic tissue. t. subcutanea [TA] SYN: subcutaneous tissue. t. subcutanea penis [TA] t. subcutanea perinei [TA] t. submucosa SYN: submucosa. t. submucosa pharyngis SYN: pharyngobasilar fascia. t. subserosa [TA] SYN: subserosa. t. vasculosa SYN: choroid plexus.

Teladorsagia davtiani (te′la-dor-sa′je-a dav-she-an′i)
One of the medium stomach worm species (family Trichostrongylidae) of sheep, goats, and deer occurring in the abomasum; it is similar to Ostertagia trifurcata. [tele- + L. dorsum, back]

telalgia (tel-al′je-a)
SYN: referred pain. [G. tele, distant, + algos, pain]

telangiectasia (tel-an′je-ek-ta′ze-a)
Dilation of the previously existing small or terminal vessels of a part. SYN: angiotelectasis, angiotelectasia. [G. telos, end, + angeion, vessel, + ektasis, a stretching out] cephalo-oculocutaneous t. an angioma involving the skin of the face, orbit, meninges, and brain. SEE ALSO: Sturge-Weber syndrome. essential t. 1. localized capillary dilation of undetermined origin; 2. SYN: angioma serpiginosum. hereditary benign t. an autosomal dominant disorder in which the face, upper trunk, and arms develop telangiectasias. hereditary hemorrhagic t. [MIM*187300] a disease with onset usually after puberty, marked by multiple small telangiectases and dilated venules that develop slowly on the skin and mucous membranes; the face, lips, tongue, nasopharynx, and intestinal mucosa are frequent sites, and recurrent bleeding may occur; autosomal dominant inheritance, caused by mutation in the gene (ENG) encoding endoglin on chromosome 9q. SYN: Rendu-Osler-Weber syndrome. t. lymphatica SYN: lymphangiectasis. t. macularis eruptiva perstans a disseminated eruption of telangiectases associated with erythematous and edematous macules. primary t. SYN: angioma serpiginosum. secondary t. t. related to a known cause of prolonged dermal vascular dilation such as sunlight, varicose veins, and connective tissue diseases; often associated with atrophy of the skin. spider t. SYN: spider angioma. t. verrucosa SYN: angiokeratoma.

telangiectasis, pl .telangiectases (tel-an′je-ek′ta-sis, -sez)
A lesion formed by a dilated capillary or terminal artery, most commonly on the skin. See telangiectasia.

telangiectatic (tel-an′je-ek-tat′ik)
Relating to or marked by telangiectasia.

telangiectodes (tel-an′je-ek-to′dez)
A term used to qualify highly vascular tumors. [telangiectasis + G. -odes, fr. eidos, resemblance]

telangioma (tel-an′je-o′ma)
Angioma due to dilation of the capillaries or terminal arterioles.

telangion (tel-an′je-on)
One of the terminal arterioles or a capillary vessel. SYN: trichangion. [G. telos, end, + angeion, vessel]

telangiosis (tel′an-je-o′sis)
Any disease of the capillaries and terminal arterioles.

tele (tel′e)
Referring to the nitrogen atom of the imidazole ring of histidine that is the farthest from the β-carbon. Cf.:pros. [G. far]

See tel-.

telecanthus (tel-e-kan′thus)
Increased distance between the medial canthi of the eyelids. SYN: canthal hypertelorism. [G. tele, distant, + kanthos, canthus]

telecardiogram (tel-e-kar′de-o-gram)
SYN: telelectrocardiogram.

telecardiophone (tel-e-kar′de-o-fon)
A specially constructed stethoscope by means of which heart sounds can be heard by listeners at a distance from the patient. [G. tele, distant, + kardia, heart, + phone, sound]

telecobalt (tel′e-ko′bawlt)
Teletherapy using radioactive cobalt as the source.

telediagnosis (tel′e-di-ag-no′sis)
Detection of a disease by evaluation of data transmitted to a receiving station, a process normally involving patient-monitoring instruments and a transfer link to a diagnostic center at some distance from the patient.

telediastolic (tel′e-di-a-stol′ik)
Pertaining to or occurring toward the end of ventricular diastole. [G. telos, end, + diastole, dilation]

SYN: fortification spectrum.

telelectrocardiogram (tel′e-lek-tro-kar′de-o-gram)
An electrocardiogram recorded at a distance from the subject being tested; e.g., the electrocardiogram obtained through telemetry, or, as with a galvanometer in the laboratory, being connected by a wire with the patient in another room. SYN: telecardiogram. [G. tele, distant, + electrocardiogram]

telemeter (te-lem′e-ter)
An electronic instrument that senses and measures a quantity, then transmits radio signals to a distant station for recording and interpretation. [G. tele, distant, + metron, measure]

telemetry (te-lem′e-tre)
The science of measuring a quantity, transmitting the results by radio signals to a distant station, and there interpreting, indicating, and/or recording the results. SEE ALSO: biotelemetry. cardiac t. transmission of cardiac signals (electric or pressure derived) to a receiving location where they are displayed for monitoring.

telencephalic (tel′en-se-fal′ik)
Relating to the telencephalon or endbrain.

telencephalization (tel-en-sef′al-i-za′shun)
SYN: corticalization.

telencephalon (tel-en-sef′a-lon) [TA]
The anterior division of the prosencephalon, which develops into the olfactory lobes, the cortex of the cerebral hemispheres, and the subcortical telencephalic nuclei, and the basal ganglia (nuclei), particularly the striatum and the amygdala. SYN: endbrain. [G. telos, end, + enkephalos, brain]

teleology (tel-e-ol′o-je)
The philosophical doctrine according to which events, especially in biology, are explained in part by reference to final causes or end goals; the doctrine that goals or end states have a causal influence on present events and that the future as well as the past affect the present. [G. telos, end, + logos, study]

teleomitosis (tel′e-o-mi-to′sis)
A completed mitosis. [G. teleos, complete, + mitosis]

teleomorph (tel′e-o-morf)
A reproductive structure of a fungus that is a result of plasmogamy and nuclear recombination; sexual state (sexual reproduction). SYN: perfect stage.

teleonomic (tel′e-o-nom′ik)
1. Pertaining to teleonomy. 2. In psychology, pertaining to those patterns of behavior that are a function of an inferred purpose or motive; e.g., a child's behavior pattern may be classified teleonomically by an observer as attention-getting.

teleonomy (tel-e-on′o-me)
The doctrine that life is characterized by endowment with a project or purpose; i.e., the existence in an organism of a structure or function implies that it has had evolutionary survival value. [G. telos, end, + nomos, law]

teleopsia (tel-e-op′se-a)
An error in judging the distance of objects arising from lesions in the parietal temporal region. [G. tele, distant, + opsis, vision]

teleorganic (tel′e-or-gan′ik)
Manifesting life. [G. teleos, complete, + organikos, organic]

telepathine (tel-e-path′en)
SYN: harmine.

telepathy (te-lep′a-the)
Transmittal and reception of thoughts by means other than through the normal senses, as a form of extrasensory perception. SYN: extrasensory thought transference, mind-reading. [G. tele, distant, + pathos, feeling]

teleradiography (tel-e-ra-de-og′ra-fe)
Radiography with the x-ray tube positioned about 2 m from the film thereby securing practical parallelism of the x-rays to minimize geometric distortion; the standard configuration for chest radiography. Cf.:air-gap technique. SYN: teleroentgenography. [G. tele, distant, + radiography]

teleradiology (tel-e-ra-de-ol′o-je)
The interpretation of digitized diagnostic images transmitted by modem over telephone lines. [tele- + radiology]

teleradium (tel′e-ra′de-um)
See t. therapy.

telereceptor (tel′e-re-sep′ter, -tor)
An organ, such as the eye, that can receive sense stimuli from a distance.

telergy (tel′er-je)
SYN: automatism. [G. tele, far off, + ergon, work]

teleroentgenography (tel′e-rent-gen-og′ra-fe)
SYN: teleradiography.

teleroentgentherapy (tel′e-rent′gen-thar′a-pe)
SYN: teletherapy.


telesis (tel-e′sis)
A goal to be attained by planned conduct. [G. telos, end, + -osis, condition]

telesystolic (tel′e-sis-tol′ik)
Relating to the end of ventricular systole. [G. telos, end, + systole, a contracting]

teletherapy (tel-e-thar′a-pe)
Radiation therapy administered with the source at a distance from the body. Cf.:interstitial therapy. SYN: teleroentgentherapy. [G. tele, distant, + therapeia, treatment]

Richard W., U.S. gynecologist, *1894. See T. operation.

telluric (te-loor′ik)
1. Relating to or originating in the earth. 2. Relating to the element tellurium, especially in its 6+ valence state. [L. tellus (tellur-), the earth]

tellurism (tel′oo-rizm)
The alleged influence of soil emanations in producing disease. [L. tellus (tellur-), the earth]

tellurium (Te) (tel-oo′re-um)
A rare semimetallic element, atomic no. 52, atomic wt. 127.60, belonging to the sulfur group. [L. tellus (tellur-), the earth]

See tel-.

telodendron (tel-o-den′dron)
An anomalous term that refers to the terminal arborization of an axon. SYN: end-brush. [G. telos, end, + dendron, tree]

telogen (tel′o-jen)
Resting phase of hair cycle. [G. telos, end, + -gen, producing]

teloglia (te-log′le-a)
Accumulation of neurolemmal cells at the myoneural junction. [G. telos, end, + glia, glue]

telognosis (tel-og-no′sis)
Obsolete term denoting diagnosis by means of radiographs or other diagnostic tests transmitted by telephone or radio. See teleradiology. [G. tele, distant, + gnosis, a knowing]

telokinesia (tel′o-ki-ne′ze-a)
SYN: telophase. [G. telos, end, + kinesis, movement]


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