| stallion | A male horse not castrated; a male horse kept for breeding. Origin: OE. Stalon, OF. Estalon, F. Etalon, fr. OHG. Stal a stable. See Stall. Source: Websters Dictionary (01 Mar 1998) |
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| TAB vaccine | A suspension of killed typhoid and paratyphoid A and B bacilli. See: typhoid vaccine. Synonym: TAB vaccine. (05 Mar 2000) |