/ Dictionary / Index A asteroidean: Meaning and Definition of Find definitions for: as•ter•oi•de•an Pronunciation: (as"tu-roi'dē-un), [key] — n. an echinoderm of the class Asteroidea, comprising the starfishes. —adj. belonging or pertaining to the Asteroidea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Asteroidea Asteropaeus 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