Plesiosaur Definition

plēsē-ə-sôr, plēzē-
plesiosaurs
noun
plesiosaurs
Any of an extinct group (order Sauropterygia) of large water reptiles of the Mesozoic Era, characterized by a small head, long neck, short tail, and four paddlelike limbs.
Webster's New World
Synonyms:
  • plesiosaurus

Other Word Forms of Plesiosaur

Noun

Singular:
plesiosaur
Plural:
plesiosaurs

Origin of Plesiosaur

  • New Latin Plēsiosaurus type genus Greek plēsios near to pel-5 in Indo-European roots Greek sauros lizard

    From American Heritage Dictionary of the English Language, 5th Edition

  • plesio- +"Ž -saur

    From Wiktionary

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plesiosaur