pen·i·cil·lin 
(pĕn′ĭ-sĭlĭn)
(pĕn′ĭ-sĭlĭn)n.
1. An antibiotic drug obtained from molds especially of the genus Penicillium or produced synthetically, available in various preparations and usually used to treat infections caused by gram-positive bacteria.
2. Any of a group of broad-spectrum antibiotic drugs, synthetic or semisynthetic, that are derived from penicillin.
[PENICILL(IUM) + -IN.]
- procaryote
- procedural
- procedurally
- procedure
- proceed
- proceeder
- proceeding
- procephalic
- procercoid
- process
- process
- procession
- processional
- processionally
- processor
- process printing
- prochlorperazine
- pro-choice
- pro-choicer
- proclaim
- proclaimer
- proclaim from the housetops
- proclamation
- proclamatory
- proclisis