/ Dictionary / Index P plasm-: Meaning and Definition of Find definitions for: plasm- Pronunciation: [key] var. ofbefore a vowel: plasmapheresis. -plasm Pronunciation: [key] a combining form with the meanings “living substance,” “tissue,” “substance of a cell,” used in the formation of compound words: endoplasm; neoplasm; cytoplasm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasm- (Thesaurus) -plasia plasma 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