plinth
plinth \'plin(t)th\ \'plin(t)s, 'plin(t)ths\ n or plinths [L plinthus, fr. Gk plinthos] pl 1a: the lowest member of a base : SUBBASE 1b: a block upon which the moldings of an architrave or trim are stopped at the bottom 2: a square block serving as a base 3: a course of stones forming a continuous foundation or base course