| testicle | <anatomy> One of two glandular bodies contained in the scrotum of the male, they form sperm and also the male sex hormone testosterone. (13 Jan 1998) |
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| testicles | The male sex glands. The testicles produce and store sperm and are the major source of testosterone. (12 Dec 1998) |
| testicond | <zoology> Having the testicles naturally concealed, as in the case of the cetaceans. Origin: L. Testis testis + condere to hide. Source: Websters Dictionary (01 Mar 1998) |
| testicular | <anatomy> Pertaining to a testis. (18 Nov 1997) |
| testicular appendage | A vesicular nonpedunculated structure attached to the cephalic pole of the testis; a vestige of the cephalic end of the paramesonephric (mullerian) duct. Synonym: appendix testis, appendix of the testis, nonpedunculated hydatid, ovarium masculinum, sessile hydatid. (05 Mar 2000) |
| testicular artery | <anatomy, artery> Origin, aorta; branches, ureteral, cremasteric, epididymal; distribution, testicle and parts designated by names of branches; anastomoses, branches of renal, inferior epigastric, deferential. Synonym: arteria testicularis, arteria spermatica interna, internal spermatic artery. (05 Mar 2000) |
| testicular biopsy | <procedure> The removal of a fragment of a testicle for examination under the microscope. (13 Jan 1998) |
| testicular cancer | <oncology> A malignant growth that arises from a glandular cell in the testis. Common symptoms include a painless testicular mass in a male between the ages of 15 and 35 years. Monthly self-examinations are recommended in those between the ages of 15 and 39 years of age. (13 Jan 1998) |
| testicular cord | A group of structures which go through the inguinal canal to the testis. The structures include the vas deferens, arteries, veins, lymphatic vessels, and nerves. (12 Dec 1998) |
| testicular duct | The secretory duct of the testicle, running from the epididymis, of which it is the continuation, to the prostatic urethra where it terminates as the ejaculatory duct. Synonym: deferent canal, deferent duct, spermatic duct, spermiduct, testicular duct, vas deferens. (05 Mar 2000) |
| testicular dysgenesis | A congenital derangement of seminiferous tubular structure and function, resulting in male infertility; the defect in spermatogenesis may be incomplete, as in maturational arrest or premature sloughing, or spermatogenesis may be completely absent, as in the Sertoli-cell-only syndrome. (05 Mar 2000) |
| testicular feminisation | <endocrinology> if genetic males lack receptors for testosterone they develop as females and are unresponsive to male hormones. (13 Jan 1998) |
| testicular feminization | A condition, due to lack of cellular receptors for testosterone and dihydrotestosterone, in which the subject is phenotypically female but lacks nuclear sex chromatin and is of xy chromosomal sex. The uterus and tubes are absent or rudimentary, and the gonads are typically testes and may be abdominal or inguinal in position. The incomplete form is marked by partial fusion of the labioscrotal folds and clitoromegaly, and at puberty, variable feminization and partial virilization may both take place. (12 Dec 1998) |
| testicular feminization syndrome | <syndrome> A type of male pseudohermaphroditism characterised by female external genitalia (may be ambiguous if the syndrome is incomplete), incompletely developed vagina often with rudimentary uterus and fallopian tubes, female habitus at puberty but with scanty or absent axillary and pubic hair and amenorrhoea, and testes present within the abdomen or in the inguinal canals or labia majora; epididymis and vas deferens are usually present; androgens and oestrogens are formed, but target tissues are largely unresponsive to androgens; individuals are sex chromatin-negative and have a normal male karyotype; X-linked recessive inheritance; there is a defect in the androgen receptor protein. (05 Mar 2000) |
| testicular hormones | Hormones produced in the testis. (12 Dec 1998) |
| antibiotic sensitivity test | The in vitro testing of bacterial cultures with antibiotics to determine susceptibility of bacteria to antibiotic therapy. (05 Mar 2000) |
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| antibody-coated bacteria test, urinary | Fluorescent antibody technique for visualizing antibody-bacteria complexes in urine. The presence or absence of antibody-coated bacteria in urine correlates with localization of urinary tract infection in the kidney or bladder, respectively. (12 Dec 1998) |
| antiglobulin test | Haemagglutination test in which coombs' reagent (antiglobulin, or anti-human globulin rabbit immune serum) is added to detect incomplete (non-agglutinating, univalent, blocking) antibodies coating erythrocytes. The direct test is applied to red cells which have been coated with antibody in vivo (e.g., in haemolytic disease of newborn, autoimmune haemolytic anaemia, and transfusion reactions). The indirect test is applied to serum to detect the presence of antibody (e.g., in detection of incompatibility in cross-matching tests, detection and identification of irregular antibodies, and in detection of antibodies not identifiable by other means). (12 Dec 1998) |
| antithrombin test | A procedure for estimating the inhibitory effect of a defibrinated specimen of plasma on the action of thrombin in converting fibrinogen to fibrin. (05 Mar 2000) |
| aptitude test | An occupation-oriented intelligence test used to evaluate a person's abilities, talents, and skills; particularly valuable in vocational counseling. (05 Mar 2000) |
| Apt test | A test for identifying foetal blood by the addition of sodium hydroxide and water to a specimen. (05 Mar 2000) |
| Aschheim-Zondek test | An obsolete test for pregnancy; repeated injections of small quantities of urine voided during the first months of pregnancy produce in infantile mice, within 100 hours, minute intrafollicular ovarian haemorrhages, and the development of lutein cells. Synonym: A.-Z. Test, Zondek-Aschheim test. (05 Mar 2000) |
| Ascoli's test | A precipitin test for anthrax using a tissue extract and anthrax antiserum. (05 Mar 2000) |
| ascorbate-cyanide test | A test for glucose-6-phosphate-deficient red blood cells; blood is incubated with sodium cyanide and ascorbate; the hydrogen peroxide generated is free to oxidise haemoglobin to methemoglobin, since cyanide inhibits catalase; a brown colour is produced more rapidly in glucose 6-phosphate-deficient cells. (05 Mar 2000) |
| aspergillus antigen skin test | <investigation> An antigen, prepared from aspergillus, is injected into the skin. In 48 to 72 hours the site is read as positive or negative. A positive skin test (inflammation at the test site) indicates prior exposure to aspergillus and therefore a risk for developing aspergillosis. (27 Sep 1997) |
| association test | A word (stimulus word) is spoken to the subject, who is to reply immediately with another word (reaction word) suggested by the first; used as a diagnostic aid in psychiatry and psychology, clues being given by the length of time (association time) between the stimulus and reaction words, and also by the nature of the reaction words. (05 Mar 2000) |
| Astwood's test | A test for the assay of oestrogenic substances; immature female rats (25 to 49 g) are injected subcutaneously with the hormone and killed after 6 hours, when the increase in uterine weight (due largely to imbibation of water) is taken as the criterion of oestrogenic activity. Synonym: Astwood's test. (05 Mar 2000) |
| atropine test | If an injection of atropine relieves bradycardia, the condition is due to action of the vagus; if it does not, the condition may be due to an affection of the heart itself. Synonym: atropine test. (05 Mar 2000) |
| augmented histamine test | A test for maximal production of gastric acidity or anacidity; after preliminary administration of an antihistamine, histamine acid phosphate is injected subcutaneously in a dose of 0.04 mg/kg of body weight, followed by analysis of gastric contents. Synonym: augmented histamine test. (05 Mar 2000) |
| aussage test | A test of ability to reproduce correctly something that has been seen for a brief interval. Origin: Ger. Aussage, a declaration (05 Mar 2000) |