synapsid

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Pronunciation

• (British) IPA: /sɪˈnapsɪd/

Adjective

synapsid

1. Pertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each eye, leaving a bony arch beneath each.
   • 1999, Matt Ridley, Genome, Harper Perennial 2000, p. 26:

     We are synapsid tetrapods, a group of reptiles that almost went extinct 200 million years ago in competition with the better-designed dinosaurs.

Noun

synapsid (plural synapsids)

1. Any animal (including all mammals) of the class Synapsida.

Synonyms

• mammal-like reptile (dated)
• stem mammal

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