epicyteBiol.|ˈɛpɪsaɪt| [f. epi- + cyte.] The investing membrane of a cell. 1900in Dorland Med.Dict.1903E. A. Minchin in E. R. Lankester Zool. i. i. 179 The cuticle or epicyte [in Gregarines] is a membrane secreted by the ectoplasm, usually of some thickness.