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Meaning of exocytosis

ex•o•cy•to•sis

Pronunciation: (ek"sō-sī-tō'sis), [key]
— n. Physiol.
  1. 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.