synapsid means 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. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
synapsid is pronounced /sɪˈnapsɪd/.
Etymology
From translingual Synapsida, from syn- + Ancient Greek ἁψίς (hapsís, “arch”).
adj
- 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.“We are synapsid tetrapods, a group of reptiles that almost went extinct 200 million years ago in competition with the better-designed dinosaurs.”
noun
- Any animal (all mammals) of the class Synapsida.