plesiosaurus

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noun

Any of the genus †Plesiosaurus of extinct long-necked marine reptiles from the Early Jurassic.

Similar
plesiosaur
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Meanings

nounplesiosaurus (plural plesiosauruses or plesiosauri)

plural plesiosauruses · plural plesiosauri

  1. Any of the genus †Plesiosaurus of extinct long-necked marine reptiles from the Early Jurassic.

    "Plesiosaurus! A fresh-water plesiosaurus!" cried Summerlee.

    1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC

Synonyms & antonyms

nounextinct marine reptile with a small head on a long neck and a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous

Similar
plesiosaur
Broader
archosaurarchosaurianarchosaurian reptile
Also see
plesiosaur

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

plesiosaurus. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/plesiosaurus

MLA

“plesiosaurus.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/plesiosaurus. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “plesiosaurus,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/plesiosaurus.

Source: plesiosaurus on Wiktionary, CC BY-SA 4.0.