ἱερογείον, formed from ὑπό, under, and γῆ, earth, in the ancient architecture, is a name common to all the parts of a building which are under ground; as the cellar, butteries, and such like places. The term hypogeum was used by the Greeks and Romans for subterraneous tombs in which they buried their dead.

ἱερογείον, in Astrology, is a name given to the celestial houses which are below the horizon; especially the inum carli, or bottom of heaven.

HYPOGASTRIC, an appellation given to the internal branch of the iliac artery.