In classical architecture, a plinth is a vertically faced member immediately below the circular base of a column. The term also describes the lowest member of a pedestal and in general, the lowest member of a base; a sub-base; a block upon which the mouldings of an architrave or trim are stopped at the bottom. Research Plinth
In architecture a quadra is the plinth, or lowest member, of any pedestal, podium, water table, or the like. The term is also used to describe the border around a bas-relief. Research Quadra
A scamillus is a sort of second plinth or block, below the bases of Ionic and Corinthian columns, generally without mouldings, and of smaller size horizontally than the pedestal. Research Scamillus
In architecture, a socle is a plain block or plinth forming a low pedestal. The term is especially used for the base of a statue, column, or the like. Research Socle
In architecture a spur is a short wooden buttress of a post. The term also describes a projection from the round base of a column, occupying the angle of a square plinth upon which the base rests, or bringing the bottom bed of the base to a nearly square form. It is generally carved in leafage.
 
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Matt and Leela Probert