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pterosaur

[ter-uh-sawr] /ˈtɛr əˌsɔr/
noun
1.
any flying reptile of the extinct order Pterosauria, from the Jurassic and Cretaceous periods, having the outside digit of the forelimb greatly elongated and supporting a wing membrane.
Origin
1860-1865
1860-65; < Neo-Latin Pterosauria; see ptero-, -saur
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for pterosaur

pterosaur

/ˈtɛrəˌsɔː/
noun
1.
any extinct flying reptile of the order Pterosauria, of Jurassic and Cretaceous times: included the pterodactyls Compare dinosaur, plesiosaur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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pterosaur in Science
pterosaur
  (těr'ə-sôr')   
Any of various extinct flying reptiles of the Jurassic and Cretaceous Periods with wings consisting of a flap of skin supported by an elongated fourth digit on each forelimb (rather than an elongated second digit as in birds). Some pterosaurs were unique among reptiles in being covered with hair. Pterosaurs had wingspans ranging from less than 0.3 m (1 ft) to close to 15.2 m (50 ft).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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