- Rounded, cuplike, hollow parts of objects, such as the body of a stemmed vessel or the part of a pipe in which tobacco is burned.
- Rounded vessels that are generally wider than they are high, usually hemispherical or nearly so. A bowl may have a spreading base or foot ring and sometimes two handles or a cover. Distinguished from a cup, which is rather deep than wide.
- Naturally occurring sediments that are produced by chemical actions resulting during the weathering of rocks. Clays are composed of hydrated aluminum silicates, such as Kaolinite, Illite, Palygorskite, Attapulgite, Bentonite, and Montmorillonite. Small amounts of other minerals can change the color (white, yellow, brown or red) and texture of the clays. Clays may include all earths that form a paste with water and harden when heated.