Webster’s Revised Unabridged Dictionary · 1913
Cassiopeia
Cas′si·o·pe′ia, n. [NL., fr. Gr. Κασσιόπεια.] (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.