Permistion \Per*mis"tion\ (p[~e]r*m[i^]s"ch[u^]n), n. [L. permistio, permixtio, fr. permiscere, permistum, and permixtum. See {Permiscible}.] The act of mixing; the state of being mingled; mixture. [Written also {permixtion}.] [1913 Webster]