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metformin.

A biguanide derivative, C₄H₁₁N₅, used, now chiefly as the hydrochloride, as an oral hypoglycemic agent in the treatment of type 2 diabetes mellitus; 1,1-dimethylbiguanide.

9 characters3 syllables approx.English language

Meaning & usage

noun/mɛtˈfɔː.mɪn/Received-Pronunciation/mɛtˈfɔɹ.mɪn/General-American
  1. A biguanide derivative, C₄H₁₁N₅, used, now chiefly as the hydrochloride, as an oral hypoglycemic agent in the treatment of type 2 diabetes mellitus; 1,1-dimethylbiguanide.

    countable · uncountable
Where this word comes from

From meth- + -formin (“phenformin derivative”).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.