/ Dictionary / Index A Asteroidea: Meaning and Definition of Find definitions for: As•ter•oi•de•a Pronunciation: (as"tu-roi'dē-u), [key] — n. the class comprising the starfishes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: asteroidea (Thesaurus) asteroid belt asteroidean Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language