[f. as prec. + -ISM.] Method, system, or principle of triads; arrangement in groups of three; threefold constitution.
1846. T. W. Jenkyn, Baxter’s Wks., Pref. Ess., p. l. The method which Baxter adopted for systematizing the doctrines of theology may be called Triadism. [Cf. TRICHOTOMIZE.]
1909. A. R. Colquhoun in Q. Rev., April, 672. The suggestion that triadism should supersede dualism as the basis of the [Habsburg] monarchy supposes the erection of a third (i. e. a Slav) State.
