/ Dictionary / Index N nemertean: Meaning and Definition of Find definitions for: ne•mer•te•an Pronunciation: (ni-mûr'tē-un), [key] — n. any member of the invertebrate phylum Nemertea, comprising the ribbon worms. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nemertean (Thesaurus) Nemerov nemesis Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language