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(Zoology) of, relating to, or belonging to the Rhynchocephalia, an order of lizard-like reptiles common in the Mesozoic era but today represented only by the tuatara
(Animals) any reptile belonging to the order Rhynchocephalia
[C19: from New Latin Rhynchocephalia, from Greek rhunkhos a snout + kephalē head]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌrɪŋ koʊ səˈfeɪl yən, -ˈfeɪ li ən)

1. belonging to the Rhynchocephalia, an order of lizardlike reptiles.
2. a rhynchocephalian reptile.
[1865–70; < New Latin Rhynchocephali(a) (< Greek rhýncho(s) snout + New Latin -cephalia; see -cephalous, -ia) + -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Given what we know about Late Triassic continental tetrapods, the most plausible hypothesis is that the trackmaker is a lepidosauromorph such as a rhynchocephalian (Baird 1957) or a small early archosauromorph.
Catalogue of the Chelonians, Rhynchocephalians, and Crocodiles in the British Museum (Natural History).