Opisthodome \O*pis"tho*dome\, n. [L. opisthodomus, Gr. ?;
'o`pisqen behind + do`mos house: cf. F. opisthodome.] (Arch.)
A back chamber; especially, that part of the naos, or cella,
farthest from the main entrance, sometimes having an entrance
of its own, and often used as a treasury.
[1913 Webster]