| TAB vaccine | A suspension of killed typhoid and paratyphoid A and B bacilli. See: typhoid vaccine. Synonym: TAB vaccine. (05 Mar 2000) |
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| troche | <pharmacology> A medicinal tablet or lozenge; strictly, one of circular form. Origin: Gr. Trochos anything round or circular, a wheel, properly, a runner, fr. Trechein to run. Cf. Trochee. Source: Websters Dictionary (01 Mar 1998) |