\En"dos*mose`\, Endosmosis \En`dos*mo"sis\, n. [NL. endosmosis, fr. Gr. 'e`ndon within + ? a thrusting, impulsion, fr. ? to push: cf. F. endosmose.] (Physics) The transmission of a fluid or gas from without inward in the phenomena, or by the process, of osmose.