: a crystalline base C7H6N2 that is composed of a benzene ring fused with an imidazole ring and is structurally similar to purine
also : any of various derivatives (such as thiabendazole, omeprazole, or benomyl) of this base typically possessing therapeutic properties including broad-spectrum anthelmintic, fungicidal, or antimicrobial action

Examples of benzimidazole in a Sentence

Recent Examples on the Web Hookworm is typically treated with one of three classes of antiparasitic drugs: benzimidazoles, macrocyclic lactones or tetrahydropyrimidines. Bradley Van Paridon, Scientific American, 1 June 2023 Synthesized in the 1950s for research, nitazene compounds are synthetic opioids that belong to a drug class called benzimidazole-opioids, according to the Ohio Bureau of Criminal Investigation Laboratory Division. Tori B. Powell, CBS News, 20 Apr. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'benzimidazole.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1898, in the meaning defined above

Time Traveler
The first known use of benzimidazole was in 1898

Dictionary Entries Near benzimidazole

Cite this Entry

“Benzimidazole.” Dictionary, Merriam-Webster, Accessed 20 May. 2024.

Medical Definition


: a crystalline base C7H6N2 used especially to inhibit the growth of various viruses, parasitic worms, and fungi
also : one of its derivatives

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