| trimester | A period of 3 months; one-third of the length of a pregnancy. Origin: L. Trimestris, of three-month duration (05 Mar 2000) |
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| trimetaphan camsylate | D-1,3-dibenzyldecahydro-2-oxoimidazo[c]thieno[1,2-a]thiolium camphorsulfonate;a ganglionic blocking agent that produces vasodilation of brief duration; used in surgery, particularly neurosurgery, to produce a relatively bloodless operative field (controlled hypotension). Synonym: trimetaphan camsylate. (05 Mar 2000) |
| trimetazidine | <chemical> 1-(2,3,4-trimethoxybenzyl)piperazine. A vasodilator used in angina of effort or ischemic heart disease. Pharmacological action: vasodilator agents. Chemical name: Piperazine, 1-((2,3,4-trimethoxyphenyl)methyl)- (12 Dec 1998) |
| trimeter | Consisting of three poetical measures. A poetical division of verse, consisting of three measures. Origin: L. Trimetrus, Gr.; (see Tri-) + measure. See Meter measure. Source: Websters Dictionary (01 Mar 1998) |
| trimethadione | <chemical> An anticonvulsant effective in absence seizures, but generally reserved for refractory cases because of its toxicity. Pharmacological action: anticonvulsants. Chemical name: 2,4-Oxazolidinedione, 3,5,5-trimethyl- (12 Dec 1998) |
| trimethaphan | <chemical> A nicotinic antagonist that has been used as a ganglionic blocker in hypertension, as an adjunct to anaesthesia, and to induce hypotension during surgery. Pharmacological action: anaesthesia adjuvants, antihypertensive agents, ganglionic blockers, nicotinic antagonists. Chemical name: Thieno(1',2':1,2)thieno(3,4-d)imidazol-5-ium, decahydro-2-oxo-1,3-bis(phenylmethyl)- (12 Dec 1998) |
| trimethaphan camsylate | D-1,3-dibenzyldecahydro-2-oxoimidazo[c]thieno[1,2-a]thiolium camphorsulfonate;a ganglionic blocking agent that produces vasodilation of brief duration; used in surgery, particularly neurosurgery, to produce a relatively bloodless operative field (controlled hypotension). Synonym: trimetaphan camsylate. (05 Mar 2000) |
| trimethidium methosulfate | (+)-[N-Methyl-N-(gamma-trimethylammoniumpropyl)]-1,8,8-t rimethyl-3-azabicyclo[3.2.1]octane dimethosulfate; a quaternary ammonium compound that blocks ganglionic transmission at sympathetic and parasympathetic ganglia; used in the treatment of severe hypertension. (05 Mar 2000) |
| trimethobenzamide hydrochloride | N-[(2-Dimethylaminoethoxy)benzyl]-3,4,5-trimethoxybenzamide hydrochloride;an antiemetic. (05 Mar 2000) |
| trimethoprim | <drug> A drug that inhibits the reduction of dihydrofolate to tetrahydrofolate (a later step than that inhibited by sulphonamides). Selective for some bacterial dihydrofolate reductases and often used in conjunction with sulphonamides. (19 Jan 1998) |
| trimethoprim resistance | Nonsusceptibility of a bacterium to the action of trimethoprim. (12 Dec 1998) |
| trimethoprim-sulfamethoxazole | A drug combination consisting of a dihydrofolate reductase inhibitor (trimethoprim) and a sulfonamide antibacterial drug (sulfamethoxazole). The drug combination is synergistic as the drugs interfere with two successive steps in the formation/utilization of folic acid by microorganisms. Used to treat many infectious diseases. (05 Mar 2000) |
| trimethoprim-sulfamethoxazole combination | <chemical> 4-amino-n-(5-methyl-3-isoxazolyl)benzenesulfonamide mixture with 5-((3,4,5-trimethoxyphenyl)methyl)- 2,4-pyrimidinediamine. This drug combination has proved to be an effective therapeutic agent with broad-spectrum antibacterial activity against both gram-positive and gram-negative organisms. It is effective in the treatment of many infections, including pneumocystis carinii pneumonia in aids, but is the drug of choice for urinary infection. Pharmacological action: anti-infective agents, anti-infective agents, urinary, antimalarials. Chemical name: Benzenesulfonamide, 4-amino-N-(5-methyl-3-isoxazolyl)-, mixt. With 5-((3,4,5-trimethoxyphenyl)methyl)-2,4-pyrimidinediamine (12 Dec 1998) |
| trimethylamine | <chemistry> A colourless volatile alkaline liquid, N.(CH3)3, obtained from herring brine, beet roots, etc, with a characteristic herringlike odour. It is regarded as a substituted ammonia containing three methyl groups. Origin: Trimethyl- + amine. Source: Websters Dictionary (01 Mar 1998) |
| trimethylamine-coenzyme M methyltransferase | <enzyme> A corrinoid protein from methanosarcina barkeri Registry number: EC 2.1.1.- Synonym: trimethylamine hs-com methyltransferase, tmcm methyltransferase (26 Jun 1999) |