/ Dictionary / Index P plasma: Meaning and Definition of Find definitions for: plas•ma Pronunciation: (plaz'mu), [key] — n. the liquid part of blood or lymph, as distinguished from the suspended elements. cytoplasm. whey. a green, faintly translucent chalcedony. a highly ionized gas containing an approximately equal number of positive ions and electrons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasma (Thesaurus) plasm- plasma cell Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language