pelycosaur

noun
pel·​y·​co·​saur | \ ˈpe-li-kə-ˌsȯr How to pronounce pelycosaur (audio) \

Definition of pelycosaur

: any of an order (Pelycosauria) of extinct, primitive, synapsid vertebrates (such as dimetrodon) chiefly of the Permian period often having extreme development of the dorsal vertebral processes and giving rise to the therapsids

First Known Use of pelycosaur

1884, in the meaning defined above

History and Etymology for pelycosaur

ultimately from Greek pelyc-, pelyx bowl + sauros lizard

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The first known use of pelycosaur was in 1884

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Dictionary Entries Near pelycosaur

pelvorenal

pelycosaur

Pelycosauria

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Cite this Entry

“Pelycosaur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pelycosaur. Accessed 27 Nov. 2021.

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More from Merriam-Webster on pelycosaur

Britannica.com: Encyclopedia article about pelycosaur

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