O-pis'tho-dōme, n.

n. [Gr. ὀπισθόδομος, from ὄπισθεν, behind, and δόμος, house; Lat. opisthodomus, Fr. opisthodome.] (Arch.) A building in the rear of another; especially, in ancient Greece, a building in the rear of a temple, often used to contain its treasures.