Thesaurus.com
Dictionary.com
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.

Penicillin, and the wider family of beta-lactam antibiotics, continue to be the most widely-used antibiotics in the world.

From BBC • Apr. 7, 2025

Penicillin, the first mass-produced antibiotic, is an example of a beta-lactam antibiotic.

From Science Daily • Jan. 16, 2024

Penicillin is not just the name of a single antibiotic—it is also a blanket term for the family of drugs containing chemical relatives of penicillin such as amoxicillin or methicillin.

From Scientific American • Oct. 5, 2023

Penicillin was made primarily from Penicillium chrysogenum and P. rubens.

From Seattle Times • Sep. 21, 2022

Penicillin was discovered when biologist Alexander Fleming accidentally left a petri dish of Staphylococcus bacteria open.

From Textbooks • Jun. 9, 2022




Vocabulary lists containing penicillin


Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "penicillin" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com