[ noun ] a member of a sect <noun.person> most sectarians are intolerant of the views of any other sect
Sectary \Sec"ta*ry\, n.;pl. {Sectaries}. [F. sectaire. See {Sect}.] A sectarian; a member or adherent of a sect; a follower or disciple of some particular teacher in philosophy or religion; one who separates from an established church; a dissenter.
I never knew that time in England when men of truest religion were not counted sectaries. --Milton.