amniote

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am·ni·ote

 (ăm′nē-ōt′)
n.
Any of numerous vertebrates of the group Amniota, characteristically having an amnion during embryonic development and including the reptiles, birds, and mammals.

[From New Latin amniōta, amniotes, from Greek amniōn, amnion (influenced by amniotic).]

amniote

(ˈæmnɪəʊt)
n
(Zoology) any vertebrate animal, such as a reptile, bird, or mammal, that possesses an amnion, chorion, and allantois during embryonic development. Compare anamniote
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amniote - any member of the Amniotaamniote - any member of the Amniota    
craniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
Amniota - higher vertebrates (reptiles, birds and mammals) possessing an amnion during development
amnion, amnios, amniotic sac - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
References in periodicals archive ?
This primer gives the reader a framework for thinking about the adaptive importance and evolutionary history of amniotic eggs, the anatomy and physiology of an egg, and the selective pressures and constraints acting on egg size, shape, and patterning.