| penicilli | any of various antibiotics obtained from penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases |
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| penicilli | the first form of penicillin that was isolated in Great Britain |
| penicilli | the penicillin that constitutes the principal component of many commercial antibiotics |
| penicilli | a penicillin that is similar in antibiotic action to penicillin G but is obtained differently |
| penicilli | a crystalline penicillin similar in action to penicillin G but more resistant to the action of gastric acids |
| penicilli | a form of penicillin V (trade name Ledercillin VK) |
| penicilli | unaffected by penicillin |
| penicilli | bacteria that are unaffected by penicillin |
| penicilli | enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic |
| penicilli | a form of penicillin that is not rendered inactive by penicillinase |
| penicilli | genus of fungi commonly growing as green or blue molds on decaying food |