| Definitions | noun
- A nickname for both the 4-8-0 and (less frequently) the 4-10-0 train configurations.

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| noun
- 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.
Translations: Etymology: First attested w:1813, 1813, from Modern Latin genus name Mastodon (w:1806, 1806), coined by w:Georges Cuvier, Georges Cuvier, from mastos, "breast" + -dont, "tooth," from the similarity of the nipple-like projections on the crowns of the extinct mammal's molars.
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