Definition of Pliosaurus in US English:

Pliosaurus

noun

  • A genus of pliosaurs, the type of the family Pliosauridae; (also pliosaurus) a pliosaur of this genus.

Origin

Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From scientific Latin Pleiosaurus, genus name from pleio- + -saurus, so called because the genus is closer to the saurian type than Ichthyosaurus.

Pronunciation

Pliosaurus

/ˌplʌɪə(ʊ)ˈsɔːrəs/