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amniote

American

[am-nee-oht] / ˈæm niˌoʊt /

noun

any vertebrate of the group Amniota, comprising the reptiles, birds, and mammals, characterized by having an amnion during the embryonic stage.

amniote British

/ ˈæmnɪəʊt /

noun

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

amniote Scientific

/ ăm′nē-ōt′ /

Any of the vertebrates that have an amnion during embryonic development. Reptiles, birds, and mammals are amniotes.

Etymology

Origin of amniote

< New Latin amniota; see amnion, -ote

Vocabulary lists containing amniote

Animals (Zoology) - High School

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Example Sentences

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See Examples For:

amniote

For the first time, scientists could see these structures clearly in an early reptile and reconstruct a complete breathing system in an early amniote.

From Science Daily ● Apr. 23, 2026

Victoria Gill, NYC, 2017 The only tattoo on Victoria’s body is the amniote vertebrae of a snake.

From The Guardian ● Nov. 25, 2020

Snakes, the carnivorous reptiles of the suborder Serpentes, are universally sinister-looking amniote vertebrates.

From Slate ● Aug. 6, 2019

The trunk of the amniote phylogenetic tree is the ancestral amniote.

From Textbooks ● Jan. 1, 2015

The primitive or primordial kidneys of the amniote embryo were formerly called the "Wolffian bodies," and sometimes "Oken's bodies."

From The Evolution of Man — Volume 2 by Haeckel, Ernst Heinrich Philipp August

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023