noun
- an antibiotic drug derived from certain molds, used to treat bacterial infections
Usage: medical
Examples
- The doctor prescribed penicillin to treat the patient’s strep throat.
- Many lives have been saved since the discovery of penicillin in 1928.
- She is allergic to penicillin and must use alternative antibiotics.
- Penicillin was the first widely used antibiotic medicine.
- The infection cleared up quickly after taking penicillin for a week.
- Alexander Fleming discovered penicillin by accident in his laboratory.