Măs'to-don, n.

(Synop., § 130), n. [Fr., Sp., & It. mastodonte, from Gr. μαστός, the breast of a woman, and ὀδούς, ὀδόντος, a tooth; so called from the conical projections upon its molar teeth.] (Zoöl.) A mammal, resembling the elephant, but larger, and having tuberculate teeth, whence the name. The remains of mastodons are found in the temperate parts of both hemispheres.

Skeleton of Mastodon giganteus.