Definition of anthracothere in US English:

anthracothere

noun

  • An extinct artiodactyl ungulate mammal of the group including Anthracotherium, found in Eurasia, Africa, and North America during the Tertiary period, and thought to be related to hippotamuses and possibly to the ancestors of whales.

Origin

Mid 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From scientific Latin anthracotherium anthracotherium, with omission of the ending.