/ Dictionary / Index E echinodermatous: Meaning and Definition of Find definitions for: e•chi•no•der•ma•tous Pronunciation: (i-kī"nu-dûr'mu-tus, ek"u-nu-), [key] — adj. belonging or pertaining to the echinoderms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. echinoderm echinoid Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language