单词 polymastodont 释义 polymastodont, a. and n. Palont.|plmstdnt|[f. mod.L. Polymastodon, -ont-, f. Gr. -, poly- + breast, nipple + ὀ tooth: cf. mastodon.]a. adj. Belonging to the genus Polymastodon or family Polymastodontid of small extinct N. Americ...