Mastodon

  1. Noun.  A nickname for both the 4-8-0 and (though incorrectly) the 4-10-0 train configurations.
  2. 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.

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This entry was last updated on RefTopia from its source on 3/20/2012.