/ Dictionary / Index A apsidiole: Meaning and Definition of Find definitions for: ap•sid•i•ole Pronunciation: (ap-sid'ē-ōl"), [key] — n. a small apse, esp. one attached to a larger apse or a transept. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. apsidal motion apsis Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language