/ Dictionary / Index N neoplasia: Meaning and Definition of Find definitions for: ne•o•pla•sia Pronunciation: (nē"ō-plā'zhu, -zhē-u, -zē-u), [key] — n. tumor growth. the formation and growth of new tissue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: neoplasia (Thesaurus) neopilina neoplasm Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language