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mastodon.

Extinct elephant-like mammal of the genus †Mammut that flourished worldwide from Miocene through Pleistocene times; differs from elephants and mammoths in the form of the molar teeth.

8 characters3 syllables approx.English language

Meaning & usage

noun/ˈmæs.tə.dɒn/Received-Pronunciation/ˈmæs.tə.dɑn/General-American/ˈmæs.tə.dən/General-American
  1. Extinct elephant-like mammal of the genus †Mammut that flourished worldwide from Miocene through Pleistocene times; differs from elephants and mammoths in the form of the molar teeth.

  2. Anything awkwardly large or unwieldy.

    figuratively
Where this word comes from

First attested 1813, from translingual Mastodon (1806), coined by French naturalist Georges Cuvier, from masto- (“breast”) + -odon (“tooth”), due to the mammilloid (“nipple-shaped”) projections on the crowns of the extinct mammal's molars.

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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.