8 letters · 11 points in Scrabble
noun extinct elephant-like mammal that flourished worldwide from Miocene through Pleistocene times; differ from mammoths in the form of the molar teeth
originFirst 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.
Etymology from Wiktionary, CC BY-SA 3.0