1. The appearance of migrating inflammatory cells in the epidermis. 2. The process whereby secretory granules or droplets are released from a cell; the membrane around the granule fuses with the cell membrane, which ruptures, and the secretion is discharged. SYN: emeiocytosis, emiocytosis. Cf.:endocytosis. [exo- + G. kytos, cell, + -osis, condition]
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exo·cy·to·sis .ek-sō-sī-'tō-səs n, pl -to·ses -.sēz the release of cellular substances (as secretory products) contained in cell vesicles by fusion of the vesicular membrane with the plasma membrane and subsequent release of the contents to the exterior of the cell
exo·cy·tot·ic -'tät-ik adj
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exo·cy·to·sis (ek″so-si-toґsis) [Gk. exo- + kutos a hollow vessel] 1. the discharge of material from a cell by fusion of a membrane-bound vesicle with the plasma membrane and subsequent release of the vesicle's contents into the extracellular environment; cf. endocytosis. 2. the aggregation of migrating leukocytes in the epidermis as part of the inflammatory response.Medical dictionary. 2011.