synapsid

/sษชหˆnapsษชd/

IPA: /S IH1 AE0 P S IH0 D/

noun
  1. 1

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

adjective
  1. 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.

Source: https://en.wiktionary.org/wiki/synapsid