/ Dictionary / Index P phagosome: Meaning and Definition of Find definitions for: phag•o•some Pronunciation: (fag'u-sōm"), [key] — n. a vacuole within a phagocyte that contains bacteria or other ingested particles and that becomes fused with a lysosome. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phagocytosis -phagous Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language