anapsid adjective 1noun 1forms 1 adjective1 •Pertaining to the group of reptiles whose skulls do not have openings near the temples, originally considered as a specific subclassThe anapsid skull: snub-nosed like an artillery shell, shockingly powerful and primitive. — 2012 noun1 •A member of this group of reptiles, including the turtles, tortoises and terrapins. formsanapsids