di·​ap·​sid dī-ˈap-səd How to pronounce diapsid (audio)
: of, relating to, or including reptiles (such as the crocodiles) with two pairs of temporal openings in the skull

Word History


ultimately from Greek di- + hapsid-, hapsis loop, arch — more at apsis

First Known Use

circa 1909, in the meaning defined above

Time Traveler
The first known use of diapsid was circa 1909

Dictionary Entries Near diapsid

Cite this Entry

“Diapsid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diapsid. Accessed 3 Feb. 2023.

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