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Definitions

penicillin

[pen-uh-sil-in] / ˌpɛn əˈsɪl ɪn /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Some important drugs, including penicillin, rely on small ring-shaped molecules that store large amounts of internal tension.

From Science Daily • May 20, 2026

This reflected portfolio changes, a poor season for sales of cough-and-cold products in Europe, and a hit from lower prices for a key penicillin ingredient, he adds.

From The Wall Street Journal • Apr. 29, 2026

The discovery began with an unexpected laboratory result, similar to many famous scientific breakthroughs including X-rays, penicillin, Viagra and modern weight loss medications.

From Science Daily • Mar. 14, 2026

Common problems that could have been treated with an office visit and a few penicillin pills will blossom into heart-valve infections and organ failure.

From MarketWatch • Jan. 26, 2026

The great contemporary achievement of modern medicine is the technology for controlling and preventing bacterial infection, but this did not fall into our laps with the appearance of penicillin and the sulfonamides.

From "The Lives of a Cell" by Lewis Thomas




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