Acroterium \Ac`ro*te`ri*um\ (-[u^]m), n.; pl. {Acroteria}. [L., fr. Gr. 'akrwth`rion summit, fr. 'a`kros topmost.] (Arch.) (a) One of the small pedestals, for statues or other ornaments, placed on the apex and at the basal angles of a pediment. Acroteria are also sometimes placed upon the gables in Gothic architecture. --J. H. Parker. (b) One of the pedestals, for vases or statues, forming a part roof balustrade.