[mod.L., f. TETRA- + Gr. καυλό-ς stem + ὀδους ὀδοντ- tooth.] An extinct elephantine genus having four tusks.
1833. Baltimore Med. & Surg. Jrnl., Oct. (Mayne).
1839. G. Roberts, Dict. Geol., Tetracaulodon, a fossil extinct animal allied to the mastodon; having four projecting teeth.
1859. Page, Handbk. Geol. Terms (1865), s.v., Professor Owen and others regard the tetracaulodon of Dr. Godman as the immature state of the Mastodon Giganteus.