Definition of "acroterion"

They include an acroterion, or pediment decoration, of a winged sphinx; an Etruscan terra cotta antefix, or roof ornament, similar to one returned by the Getty last year; and terra cotta reliefs of warriors on horseback.

2009 March 17, Elisabetta Povoledo, “Danish Museum Resists Return of Disputed Artifacts”, in New York Times‎