The Collaborative International Dictionary
epigeum
Perigee \Per"i*gee\, Perigeum \Per`i*ge"um\, n. [NL. perigeum, fr. Gr. ? about, near + ? the earth: cf. F. p['e]rig['e]e.] (Astron.) That point, in the orbit of the moon or other body orbiting the earth, which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of bodies not orbiting the earth, such as of a comet, a planet, etc. Called also epigee, epigeum.
Wiktionary
epigeum
n. (context dated English) perigee