n. [ L. plinthus, Gr. &unr_; a brick or tile, a plinth, perh. akin to E. flint: cf. F. plinthe. ] (Arch.) In classical architecture, a vertically faced member immediately below the circular base of a column; also, the lowest member of a pedestal; hence, in general, the lowest member of a base; a sub-base; a block upon which the moldings of an architrave or trim are stopped at the bottom. See Illust. of Column. [ 1913 Webster ]