In classical architecture, the main beam resting on the capitals of the columns (i e the lowest part of the entablature); the moulding around a window or door
The bottom portion of an entablature bearing on the column capitals and supporting frieze
A horizontal beam or lintel, that rests on columns or piers; or the lowest portion of an entablature; or a decorative moulding around a door, a window, or an arch
a term generally used for the molding around a door or window, and specifically used for the lowest level of the entablature, directly above the capital of a column