/ Dictionary / Index P -plasia: Meaning and Definition of Find definitions for: -plasia Pronunciation: [key] a combining form with the meaning “growth, cellular multiplication,” of the kind specified by the initial element: hypoplasia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plashy plasm- Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language