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rhynchocephalian

[ring-koh-suh-feyl-yuh n, -fey-lee-uh n] /ˌrɪŋ koʊ səˈfeɪl yən, -ˈfeɪ li ən/
adjective
1.
belonging or pertaining to the Rhynchocephalia, an order of lizardlike reptiles that are extinct except for the tuatara.
noun
2.
a rhynchocephalian reptile.
Origin
1865-1870
1865-70; < Neo-Latin Rhynchocephali(a) name of the order (< Greek rhýncho(s) snout + Neo-Latin -cephalia; see cephal-, -ia) + -an
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rhynchocephalian

rhynchocephalian

/ˌrɪŋkəʊsɪˈfælɪən/
adjective
1.
of, relating to, or belonging to the Rhyncocephalia, an order of lizard-like reptiles common in the Mesozoic era but today represented only by the tuatara
noun
2.
any reptile belonging to the order Rhyncocephalia
Word Origin
C19: from New Latin Rhynchocephalia, from Greek rhunkhos a snout + kephalē head
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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rhynchocephalian in Science
rhynchocephalian
  (rĭng'kō-sə-fāl'yən)   
Any of various mostly extinct lizardlike reptiles of the order Rhynchocephalia, whose only living representative is the tuatara (Sphenodon punctatus and S. guntheri). Rhynchocephalians have several primitive skeletal features, including two temporal arches on each side of the skull rather than one, and teeth attached to the edge of the jaw rather than set in sockets. Most rhynchocephalians died out by the end of the Jurassic Period.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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