penicillin

n.青霉素

penance, pence, penchant, pencil, pencil-case, pencil-sharpener, pendant, pendent, pending, pendulous, pendulum, penetrability, penetrable, penetrate, penetrating, penetratingly, penetration, penetrative, penguin, penholder, peninsula, peninsular, penis, penitence, penitent, penitential, penitentially, penitentiary, penitently, penknife (also `pocket-knife), penmanship, pennant, penniless, pennon, pennorth, Pennsylvania, penny, penny farthing, penny whistle, penny-pincher,