In architecture, a
a block of stone or wood that is used as the base for a pillar, statue, etc. Source: Merriam-Webster's Learner's Dictionary. Editor's note: Did You Know?
Feb 14, 2014
A block or slab on which a pedestal, column, or statue is placed. 2. The base block at the intersection of the baseboard and the vertical trim around an opening .
Late 16th century: from Latin plinthus, from Greek plinthos tile, brick, squared stone. The Latin form was in early use in English.