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amniote

[am-nee-oht] /ˈæm niˌoʊt/
noun
1.
any vertebrate of the group Amniota, comprising the reptiles, birds, and mammals, characterized by having an amnion during the embryonic stage.
Compare anamniote.
Origin
< Neo-Latin amniota; see amnion, -ote
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for amniote
  • They also reduced their reliance on wetland habitats through a crucial evolutionary adaptation known as the amniote egg.
British Dictionary definitions for amniote

amniote

/ˈæmnɪəʊt/
noun
1.
any vertebrate animal, such as a reptile, bird, or mammal, that possesses an amnion, chorion, and allantois during embryonic development Compare anamniote
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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amniote in Science
amniote
  (ām'nē-ōt')   
Any of the vertebrates that have an amnion during embryonic development. Reptiles, birds, and mammals are amniotes.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for amniote

a group of limbed vertebrates that includes all living reptiles (class Reptilia), birds (class Aves), mammals (class Mammalia), and their extinct relatives and ancestors. The amniotes are the evolutionary branch (clade) of the tetrapods (superclass Tetrapoda) in which the embryo develops within a set of protective extra-embryonic membranes-the amnion, chorion, and allantois.

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