Lewis Short
(adjective) : bĭcămĕrātus, a, um, bis-camera
* With a double vault, doubly arched: cella,Hier. ad Jovin. 1, 17: ecclesia, Aug. Civ. Dei, 15, 26.—As subst.: bĭcămĕrātum, i, n., a receptacle with two compartments, Ambros. Hexaëm. 6, 9, 72.
Charlton T. Lewis, Charles Short, A Latin Dictionary