1. Plural of methicillin; a group of semisynthetic penicillin antibiotics used to treat bacterial infections, especially those resistant to penicillin.
Usage: medical/pharmaceutical term; typically used in plural form when referring to multiple drugs or doses

Examples

• The hospital stockpiled methicillins to treat resistant bacterial strains.
• Methicillins were among the first antibiotics developed to combat penicillin-resistant infections.
• Doctors prescribed methicillins when standard penicillin proved ineffective.
• The lab tested several methicillins against the patient's bacterial culture.
• Methicillins have largely been replaced by newer antibiotics in clinical practice.