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ichthyosaur

[ik-thee-uh-sawr] /ˈɪk θi əˌsɔr/
noun
1.
any fishlike marine reptile of the extinct order Ichthyosauria, ranging from 4 to 40 feet (1.2 to 12 meters) in length and having a round, tapering body, a large head, four paddlelike flippers, and a vertical caudal fin.
Origin
1820-1830
1820-30; see ichthyosaurus
Related forms
ichthyosaurian, adjective, noun
ichthyosauroid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ichthyosaur
  • In the new show, though, it is the ichthyosaur's time to shine.
British Dictionary definitions for ichthyosaur

ichthyosaur

/ˈɪkθɪəˌsɔː/
noun (pl) -saurs, -sauruses, -sauri (-ˈsɔːraɪ)
1.
any extinct marine Mesozoic reptile of the order Ichthyosauria, which had a porpoise-like body with dorsal and tail fins and paddle-like limbs See also plesiosaur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for ichthyosaur

Ichthyosaur

n.

extinct reptile, 1830, Modern Latin, from Greek ikhthys "fish" + sauros "lizard" (see -saurus).

Online Etymology Dictionary, © 2010 Douglas Harper
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ichthyosaur in Science
ichthyosaur
  (ĭk'thē-ə-sôr')   
Any of various extinct sea reptiles of the genus Ichthyosaurus and related genera, that had a medium-sized to large dolphin-like body with a dorsal fin, four flippers, and a large, crescent-shaped tail. The head had a long beak with sharp teeth, large eyes and earbones, and nostrils near the eyes on top of the skull. Ichthyosaurs were most common and diverse in the Triassic and Jurassic Periods and died out well before the end of the Cretaceous.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for ichthyosaur

any member of an extinct group of aquatic reptiles, most of which were very similar to porpoises in appearance and habits. These distant relatives of lizards and snakes (lepidosaurs) were the most highly specialized aquatic reptiles, but ichthyosaurs were not dinosaurs.

Learn more about ichthyosaur with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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