/ Dictionary / Index E exocytosis: Meaning and Definition of Find definitions for: ex•o•cy•to•sis Pronunciation: (ek"sō-sī-tō'sis), [key] — n. Physiol. the transport of material out of a cell by means of a sac or vesicle that first engulfs the material and then is extruded through an opening in the cell membrane (distinguished from endocytosis). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. exocytose Exod. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language