Pĕd'i-ment, n.

noun

n. [From Lat. pes, pedis, a foot.] (Arch.) The triangular ornamental facing of a portico, or a similar decoration over doors, windows, gates, &c. The name is also applied to arched and circular ornaments of a like kind.

Pediment. a, pediment; b, cornice.

A triangular architectural pediment with layered molding and a cornice is shown in cross-section.
Pediment.