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Related to Ichthyornithiformes: Ichthyornithes


(Palaeontology) an extinct Cretaceous sea bird of the genus Ichthyornis, thought to have resembled a tern
[C19: New Latin, from ichthy- + Greek ornis bird]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɪk θiˈɔr nɪs)

any ternlike bird of the extinct Cretaceous genus Ichthyornis.
[< Greek ichthy- ichthy- + órnis bird]
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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Catalogue of fossil birds: part 3 (Ralliformes, Ichthyornithiformes, Charadriiformes).