penicillinase-resistant antibiotic: a form of penicillin that is not rendered inactive by penicillinase
penicillin: any of various antibiotics obtained from Penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases
tetragrammaton: four Hebrew letters usually transliterated as YHWH (Yahweh) or JHVH (Jehovah) signifying the Hebrew name for God which the Jews regarded as too holy to pronounce