isoxazolyl
adjective
is·ox·az·o·lyl
| \ (ˌ)īs-ˌäk-ˈsaz-ə-ˌlil
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Medical Definition of isoxazolyl
: relating to or being any of a group of semisynthetic penicillins (as oxacillin and cloxacillin) that are resistant to beta-lactamase, stable in acids, and active against gram-positive bacteria