Medical Term:

ampicillin

Pronunciation: am′pi-si′lin

Definition: An acid-stable semisynthetic penicillin derived from 6-aminopenicillanic acid; it has a broader spectrum of antimicrobial action than penicillin G, inhibits the growth of gram-positive and gram-negative bacteria, and is not resistant to penicillinase; also available as ampicillin sodium and ampicillin trihydrate.

Synonym(s): d(-)-α-aminobenzylpenicillin

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