Cassiope`ia, queen of Ethiopia, mother of Andromeda, placed after death among the constellations; a constellation well north in the northern sky of five stars in the figure of a W.

Cas`si*o*pe"ia (?), n. [NL., fr. Gr. &?;.] (Astron.) A constellation of the northern hemisphere, situated between Cepheus and Perseus; -- so called in honor of the wife of Cepheus, a fabulous king of Ethiopia.

Cassiopeia's Chair, a group of six stars, in Cassiopeia, somewhat resembling a chair.