(Greek mythology) Proud wife of Cepheus and mother of Andromeda, queen of Ethiopia. When she boasted that her beauty was equal to that of the Nereids, she was punished by Poseidon.

Alternative form of Cassiopeia

(astronomy) A group of six stars in Cassiopeia, somewhat resembling a chair.

(obsolete) The original name of the element lutetium.

A stinging-cell structure, composed of a layer of mainly nematocytes surrounding a core of dinoflagellates, amoebocytes and mesoglea, expelled within mucus by Rhizostomeae jellyfish to sting (and in some cases kill) prey in the surrounding water.

Alternative form of cassiopeium

(zoology) Any gastropod in the family Cassiopidae.

(zoology) Any jellyfish in the family Cassiopeidae.

plural of cassiopeid

plural of cassiopid