amniote

noun

am·​ni·​ote ˈam-nē-ˌōt How to pronounce amniote (audio)
: any of a group (Amniota) of vertebrates that undergo embryonic or fetal development within an amnion and include the birds, reptiles, and mammals
amniote adjective

Examples of amniote in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
The tuatara genome reveals ancient features of amniote evolution. Joshua Rapp Learn, Discover Magazine, 22 July 2024 Molecular diversity and evolution of neuron types in the amniote brain Behavioural processes. Lily Carey, Discover Magazine, 8 Apr. 2024 Three-dimensional skin cast and compression fossils from unknown amniotes. Evan Bush, NBC News, 11 Jan. 2024 The fossils are a kind of milepost for when amniotes were settling in on land and establishing the foundational traits of later creatures like fuzzy mammals and feathery dinosaurs. Riley Black, Smithsonian Magazine, 11 Jan. 2024 Described Thursday in Current Biology, these tatters of fossil skin and various skin impressions come from some of the earliest amniotes. Riley Black, Smithsonian Magazine, 11 Jan. 2024 During the Carboniferous Period, the evolutionary adaption of the amniote egg allowed the early tetrapods to lay their eggs on land — allowing the species to transition to a fully on-land lifestyle, according to the University of California Museum of Paleontology. Elizabeth Gamillo, Discover Magazine, 11 Jan. 2024 The solution to land's dry nature was to encase eggs in a number of membrane layers, in what is now known as an amniote egg. Christie Wilcox, Discover Magazine, 28 July 2012 The tumor that afflicted a poor Pappochelys some 240 million years ago is the oldest evidence of this type of cancer in an amniote, a lineage of four-limbed vertebrates, or tetrapods, that includes reptiles, birds and mammals. Gemma Tarlach, Discover Magazine, 7 Feb. 2019

Word History

Etymology

New Latin Amniota, from amnion

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of amniote was in 1878

Dictionary Entries Near amniote

Cite this Entry

“Amniote.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amniote. Accessed 6 Nov. 2024.

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