Definition of penicillinase in English:


Line breaks: peni|cil¦lin|ase
Pronunciation: /ˌpɛnɪˈsɪlɪneɪz


[mass noun] Biochemistry
An enzyme which can inactivate penicillin, produced by certain bacteria: the potential to produce penicillinase [count noun]: resistant to penicillinases
More example sentences
  • For example, the resistance to penicillin initially was due to production of an enzyme penicillinase by bacteria, antibiotics like cloxallin were developed which was resistant to penicillinase enzyme.
  • A control gene regulates the production of an enzyme that destroys the antibiotic, e.g. penicillinase which destroys penicillin.
  • Penicillin was first used in the early 1940s and by 1950, most Staphylococcus aureus organisms were resistant to the drug by virtue of elaboration of a penicillinase enzyme.

Definition of penicillinase in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
cause (someone) to lose confidence or hope