exosmosis

noun
ex·os·mo·sis | \ˌek-(ˌ)säs-ˈmō-səs, -(ˌ)säz- \
plural exosmoses\-ˌsēz \

Medical Definition of exosmosis 

: passage of material through a membrane from a region of higher to a region of lower concentration — compare endosmosis

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