Longman Dictionary of Contemporary English - penicillin
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Penicillin
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1.
Penicillin is a drug that kills bacteria and is used to treat infections. N-UNCOUNT ...Collins COBUILD Advanced Learner's English Dictionary
2.
noun Etymology: New Latin Penicillium Date: 1929 1. any of several relatively nontoxic antibiotic acids of the general formula C9H11N2O4SR that are produced by molds (genus Penicillium and especially P. notatum or P. chrysogenum) or synthetically and are used especially against gram-positive cocci; also a mixture of such acids 2. a salt or ester of a ~ or a mixture of such salts or esters ...Merriam-Webster Collegiate Dictionary
3.
n. any of various antibiotics produced naturally by moulds of the genus Penicillium, or synthetically, and able to prevent the growth of certain disease-causing bacteria. Etymology: mod.L Penicillium genus name f. L penicillum: see PENCIL ...Толковый словарь английского языка Oxford English Reference
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6.
- 1929, coined in Eng. from Mod.L. Penicillium notatum (1867), the mould from which it was first obtained by Alexander Fleming, from L. penicillus "paintbrush," in reference to the shape of the cells. ...Английский Этимологический словарь
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