Definition of Cepheus in English:

Cepheus

Syllabification: Ce·phe·us
Pronunciation: /ˈsēfēəs, ˈsēˌfyo͞os
 
/
Astronomy
1A constellation near the north celestial pole.
1.1 (as genitive Cephei /ˈsēfēˌī/) Used with a preceding letter or numeral to designate a star in this constellation: the star Beta Cephei

Origin

from the name of a king of Ethiopia, the husband of Cassiopeia.

Definition of Cepheus in:

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Word of the day neoteny
Pronunciation: nēˈätn-ē
noun
retention of juvenile features in the adult animal