A completely flat underside that lack any noticeable protrusions. Slightly concave bottoms can be counted in this category. During the T'ang and earlier periods, flat bottoms were the most fundamental and frequently seen base type. In later periods, they are found most commonly on jars, hu vessels, crocks, and plates.
A flat and circular eating utensil with a flared lip and a shallow draft, crafted from any non or low absorbent material. The material can be ceramic, organic or metallic as in pottery, porcelain, glass, wood, tin, pewter, silver etc.
A ring foot is a single, circular band of clay which supports the entire vessel. It varies in height and in thickness, and is applied either as a separate piece, or by being carved out on a potter's wheel.
(noun): A concave molding shaped like a quarter circle in cross section. In porcelain, usually the inward slanting area on a dish or plate between the rim and the flat inner area