Definition of plesiadapoid in US English:

plesiadapoid

noun

  • An extinct primate belonging to the suborder Plesiadapoidea.

adjective

  • Of, relating to, or characteristic of the suborder Plesiadapoidea.

Origin

1960s; earliest use found in Alfred Romer (1894–1973), paleontologist and biologist. From scientific Latin Plesiadapis, genus name + -oid, after Plesiadapoidea, suborder name.

Pronunciation

plesiadapoid

/ˌpliːzɪˈadəpɔɪd/