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clav·u·lan·ic acid | \ ˌklav-yə-ˌlan-ik- 
\
\Medical Definition of clavulanic acid
: a beta-lactam antibiotic C8H9NO5 produced by a bacterium of the genus Streptomyces (S. clavuligerus) that is a beta-lactamase inhibitor and is usually used in the form of its clavulanate salt of potassium especially in combination with amoxicillin — see augmentin
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