| thymic arteries | <anatomy, artery> Small twigs supplying anterior mediastinal structures: mainly thymus and lymph nodes. Synonym: rami mediastinales arteriae thoracicae internae, rami thymici, anterior mediastinal arteries, arteriae thymicae, thymic arteries. (05 Mar 2000) |
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| thymic branches of internal thoracic artery | <anatomy, artery> See: mediastinal branches of internal thoracic artery. (05 Mar 2000) |
| thymic corpuscle | Small spherical bodies of keratinised and usually squamous epithelial cells arranged in a concentric pattern around clusters of degenerating lymphocytes, eosinophils, and macrophages; found in the medulla of the lobules of the thymus. Synonym: Hassall's bodies, Hassall's concentric corpuscle, Virchow-Hassall bodies. (05 Mar 2000) |
| thymic factor, circulating | <chemical> A thymus-dependent nonapeptide found in normal blood. Stimulates the formation of e rosettes and is believed to be involved in T-cell differentiation. Chemical name: Thymulin (12 Dec 1998) |
| thymic hormone | <endocrinology> One of the hormones produced by the thymus that are believed to play a role in the maturation of T-lymphocytes and overall modulation of the immune system. Versions of several of them are under study as anti-HIV therapies-thymopentin and thymosin-a1 in particular. (09 Oct 1997) |
| thymic hypoplasia | diGeorge syndrome |
| thymic lymphopoietic factor | A glycoprotein (MW about 12,000) that has been extracted from thymus; this thymus-produced hormone(s) confers immunological competence on thymus-dependent cells and induces lymphopoiesis. (05 Mar 2000) |
| thymic veins | A number of small veins from the thymus emptying into the left brachiocephalic vein. Synonym: venae thymicae. (05 Mar 2000) |
| thymicolymphatic | Relating to the thymus and the lymphatic system. (05 Mar 2000) |
| thymidine | <biochemistry> Term that is always used in practice for the nucleoside thymine deoxyriboside, not the riboside which naming of the other nucleosides might lead one to expect. (18 Nov 1997) |
| thymidine 5'-diphosphate | Thymidine esterified at its 5' position with diphosphoric acid. Acronym: dTDP (05 Mar 2000) |
| thymidine 5'-monophosphate | A major constituent of DNA. Synonym: thymidine 5'-monophosphate, thymine nucleotide. (05 Mar 2000) |
| thymidine 5'-triphosphate | Thymidine esterified at its 5' position with triphosphoric acid; the immediate precursor of thymidylic acid in DNA. Acronym: dTTP (05 Mar 2000) |
| thymidine kinase | <enzyme> Of pyrimidine salvage, catalysing phosphorylation of thymine deoxyriboside to form its 5' phosphate, the nucleotide thymidylate. Animal cells lacking this enzyme can be selected by lethal synthesis, for example by resistance to bromodeoxyuridine and can be used as parentals in somatic hybridisation, since they are unable to grow in HAT medium. (18 Nov 1997) |
| thymidine monophosphate | <chemical> 5-thymidylic acid. A thymine nucleotide containing one phosphate group esterified to the deoxyribose moiety. Chemical name: 5'-Thymidylic acid (12 Dec 1998) |