Origin of cephalexin
cephalosporin + -ex- (of unknown origin) + 1-in
First Known Use: 1967
Medical Definition of cephalexin
: a semisynthetic cephalosporin C16H17N3O4S with a spectrum of antibiotic activity similar to the penicillins that is often administered in the form of its hydrochloride C16H17N3O4S·HCl
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Medical Dictionary: Definition of "cephalexin"
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