/ Dictionary / Index E echiurid: Meaning and Definition of Find definitions for: ech•i•u•rid Pronunciation: (ek"ē-yoor'id), [key] — n. any of various unsegmented marine worms of the phylum Echiura, comprising the spoonworms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. echinus echiuroid Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language