Definition of mesonychid in English:

mesonychid

noun

  • A member of the extinct family Mesonychidae of carnivorous ungulates, known from fossils of the middle to late Palaeocene epoch.

adjective

  • Belonging to, characteristic of, or designating the family Mesonychidae.

Origin

Late 19th century; earliest use found in Isaac Funk (1839–1912), publisher and reformer. From scientific Latin Mesonychidae, family name from Mesonyx, genus name from meso- + ancient Greek ὄνυξ nail + -idae.

Pronunciation

mesonychid

/ˈmɛzəʊˌnʌɪkɪd/