pen·i·cil·lin·ase /-ˈsɪləˌnes, ˌnez/
  青黴素□
  pen·i·cil·lin·ase /-ˈsɪləˌnes, ˌnez/ 名詞
  penicillinase
       n : enzyme produced by certain bacteria that inactivates
           penicillin and results in resistance to that antibiotic
           [syn: beta-lactamase]