\Hyp`o*ge"um\, n.; pl. {Hypogea}. [L., fr. Gr. ?, ?,
subterranean; ? under + ?, ?, the earth.] (Anc. Arch.)
The subterraneous portion of a building, as in amphitheaters,
for the service of the games; also, subterranean galleries,
as the catacombs.