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Medical Dictionary


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stains-all (stainz′awl)
A dye that stains phosphoproteins blue, proteins red, nucleic acids purple, and mucoproteins and mucopolysaccharides various colors on acrylamide gels; also used on tissue sections.

staircase (star′kas)
A series of reactions that follow one another in progressively increasing or decreasing intensity, so that a chart shows a continuous rise or fall. See treppe.

stalagmometer (stal-a-gom′e-ter)
An instrument for determining exactly the number of drops in a given quantity of liquid; used as a measure of the surface tension of a fluid (the lower the tension, the smaller the drops and, consequently, the more numerous in a given quantity of the fluid). SYN: stactometer. [G. stalagma, a drop, + metron, measure]

stalk (stawk)
A narrowed connection with a structure or organ. allantoic s. the narrow connection between the intraembryonic portion of the allantois and the extraembryonic allantoic vesicle. body s. the extraembryonic precursor of the connecting s. or umbilical cord by which the embryo is attached to its trophoblastic chorion. SYN: connecting s.. connecting s. SYN: body s.. s. of epiglottis the lower end or pedicle of the cartilage of the epiglottis, attached to the superior notch of the thyroid cartilage. SYN: petiolus epiglottidis. infundibular s. SYN: infundibular stem. optic s. the constricted proximal portion of the optic vesicle in the embryo; it contributes to the optic nerve. pineal s. the attachment of the pineal body to the roof of the third ventricle; it contains the pineal recess of the third ventricle. pituitary s. a process comprising the tuberal part investing the infundibular stem that attaches the hypophysis to the tuber cinereum at the base of the brain. yolk s. the narrowed connection between the intraembryonic gut and the yolk sac; its walls are splanchnopleure. SYN: umbilical duct, vitelline duct, vitellointestinal duct.

stammer (stam′er)
1. To hesitate in speech, halt, repeat, and mispronounce, by reason of embarrassment, agitation, unfamiliarity with the subject, or as yet unidentified physiologic causes. Cf.:stutter. 2. To mispronounce or transpose certain consonants in speech. [A.S. stamur]

stammering (stam′er-ing)
1. A speech disorder characterized by hesitation and repetition of words, or by mispronunciation or transposition of certain consonants, especially l, r, and s. 2. Sounds other than speech, that are similar to s.. SYN: paralalia literalis, psellism. s. of the bladder SYN: urinary stuttering.

Stamnosoma (stam-no-so′ma)
A genus of flukes of the family Heterophyidae, identical with Centrocestus. Two species, S. armatum and S. formosanum, have been described as sometimes infecting humans. [G. stamnos, a jar, + soma, body]

standard (stan′dard)
1. Something that serves as a basis for comparison; a technical specification or written report by experts. 2. See s. substance. [M.E., fr. O.Fr. estandard, rallying place, fr. Frankish standan, to stand, + hard, hard, fast]

standardization (stan′dard-i-za′shun)
1. The making of a solution of definite strength so that it may be used for comparison and in tests. 2. Making any drug or other preparation conform to the type or standard. 3. A set of techniques used to remove as far as possible the effects of differences in the age or other confounding variables when comparing two or more populations. s. of a test in psychology, the following of definite procedures for administering, scoring, evaluating, and reporting the results of a new test which is under development.

standstill
Cessation of activity. atrial s. cessation of atrial contractions, marked by absence of atrial waves in the electrocardiogram. SYN: auricular s.. auricular s. SYN: atrial s.. cardiac s. SYN: asystole. sinus s. cessation of sinus node activity, marked by absence of normal P waves in the electrocardiogram. ventricular s. cessation of ventricular contractions, marked by absence of ventricular complexes in the electrocardiogram.

Stanley
Edward, English surgeon, 1793–1862. See S. cervical ligaments, under ligament.

stannic (stan′ik)
Relating to tin, especially when in combination in its higher valency. [L. stannum, tin]

stannic chloride
SnCl4;a fuming liquid (fuming spirit of Libavius), specific gravity 2.23, boiling point 115°C, that forms several hydrates; the pentahydrate (butter of tin) is used for mordanting and “loading” or “weighting” silk.

stannic oxide
SnO2;used in industry; it is a cause of pneumoconiosis. SYN: tin oxide.

Stannius
Herman F., German biologist, 1808–1883. See S. ligature.

stannous (stan′us)
Relating to tin, especially when in combination in its lower valency. [L. stannum, tin]

stannous fluoride
A preparation containing not less than 71.2% of stannous tin and not less than 22.3% nor more than 25.5% of fluoride; used as a prophylactic against caries in dentistry.

stannum (stan′um)
SYN: tin. [L.]

stanolone (stan′o-lon)
An androgen with the same actions and uses as testosterone; used for its anabolic and tumor-suppressing effects, specifically, in carcinoma of the breast. SYN: dihydrotestosterone.

stanozolol (stan-o′zo-lol, -lol)
Stanozol, 17α-methyl-5α-androstan-17β-ol carrying a pyrazole ring (&dbond;CH–NH–N&dbond;) attached to C-2 and C-3 (see steroids for androstane structure). A semisynthetic, orally effective anabolic agent.

stapedectomy (sta-pe-dek′to-me)
Operation to remove the stapes in whole or part with replacement of the stapes by a metal or plastic prosthesis; used for otosclerosis with stapes fixation to overcome a conductive hearing loss. [stapes + G. ektome, excision]

stapedial (sta-pe′de-al)
Relating to the stapes.

stapediotenotomy (sta-pe′de-o-te-not′o-me)
Division of the tendon of the stapedius muscle. [stapedius + G. tenon, tendon, + tome, incision]

stapediovestibular (sta-pe′de-o-ves-tib′u-lar)
Relating to the stapes and the vestibule of the ear.

stapedius, pl .stapedii (sta-pe′de-us, sta-pe′de-i)
SYN: s. (muscle). [Mod. L.]

stapedotomy (sta-pe-dot′o-my)
A surgical technique for the improvement of hearing in otosclerosis: a hole is made in the footplate of the stapes bone through which is placed the piston-shaped end of a prosthesis, the other end of which is attached to the long process of the incus bone.

stapes, pl .stapesstapedes (sta′pez, sta′pe-dez) [TA]
The smallest of the three auditory ossicles; its base, or footpiece, fits into the vestibular (oval) window, while its head is articulated with the lenticular process of the long limb of the incus. SYN: stirrup. [Mod. L. stirrup]

staphyl-
See staphylo-.

staphylectomy (staf-i-lek′to-me)
SYN: uvulectomy. [staphyl- + G. ektome, excision]

staphyledema (staf′il-e-de′ma)
Edema of the uvula. [staphyl- + G. oidema, swelling (edema)]

staphyline (staf′i-lin, -len)
SYN: botryoid.

staphylion (sta-fil′e-on)
The midpoint of the posterior edge of the hard palate; a craniometric point. SEE ALSO: posterior nasal spine of horizontal plate of palatine bone. [G. dim. of staphyle, a bunch of grapes]

staphylo-, staphyl-
Resemblance to a grape or a bunch of grapes, hence relating usually to staphylococci or, in obsolescent image, to the uvula palatina. SEE ALSO: uvulo-. [G. staphyle, a bunch of grapes]

staphylococcal (staf′i-lo-kok′al)
Relating to or caused by any organism of the genus Staphylococcus.

staphylococcemia (staf′i-lo-kok-se′me-a)
The presence of staphylococci in the circulating blood. [staphylo- + G. haima, blood]

staphylococci (staf′i-lo-kok′si)
Plural of staphylococcus.

staphylococcic (staf′i-lo-kok′sik)
Relating to or caused by any species of Staphylococcus.

staphylococcolysin (staf′i-lo-ko-kol′i-sin)
SYN: staphylolysin.

staphylococcolysis (staf′i-lo-ko-kol′i-sis)
Lysis or destruction of staphylococci. [staphylo- + G. lysis, dissolution]




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