/ Dictionary / Index A anapsid: Meaning and Definition of Find definitions for: a•nap•sid Pronunciation: (u-nap'sid), [key] — adj. belonging or pertaining to the Anapsida, a subclass of reptiles, extinct except for the turtles, characterized by having no opening in the temporal region of the skull. —n. a reptile of the subclass Anapsida. Cf. diapsid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: anapsid (Thesaurus) anapophysis anaptotic Related Content Daily Word Quiz: abscond Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language