Cepheus

American  

[see-fee-uhs, -fyoos] / ˈsi fi əs, -fyus /

noun

genitive

Cephei

1. Astronomy. a northern circumpolar constellation between Cassiopeia and Draco.

2. Classical Mythology. Also an Ethiopian king, the husband of Cassiopeia and father of Andromeda.

---

Cepheus ¹ British  

/ ˈsiːfjuːs /

noun

1. Greek myth a king of Ethiopia, father of Andromeda and husband of Cassiopeia

---

Cepheus ² British  

/ ˈsiːfjuːs /

noun

1. a faint constellation in the N hemisphere near Cassiopeia and the Pole Star See also Cepheid variable

---

Cepheus Scientific  

/ sē′fyo̅o̅s′,-fē-əs /

1. A constellation in the Northern Hemisphere near Cassiopeia and Draco.

---

Other Word Forms

• Cepheid adjective

Etymology

Origin of Cepheus

from Latin Cēpheus named after the mythical king

Example Sentences

Rigetti has indicated it plans to hone its technology in the coming months, saying it expects the latest Cepheus system to reach a median 99.5% two-qubit gate fidelity—essentially, a measure of quality—later this year.

From Barron's • Apr. 8, 2026

Cantor analyst Troy Jensen noted Thursday that the company had made the technical progress needed to deploy its Cepheus system by the end of March.

From Barron's • Mar. 4, 2026

The Sh2-132 complex lies near the border of the Cepheus and Lacerta constellations and contains several deep sky structures.

From BBC • Sep. 14, 2023

King Cepheus, Cassiopeia’s beleaguered husband, consulted the oracle, who told him that he must sacrifice his beautiful daughter Andromeda to the monster.

From Textbooks • Oct. 13, 2016

Perseus, Androm´eda, Cepheus, and Cassiopeia were changed, after death, into the constellations which bear their names.

From The Student's Mythology A Compendium of Greek, Roman, Egyptian, Assyrian, Persian, Hindoo, Chinese, Thibetian, Scandinavian, Celtic, Aztec, and Peruvian Mythologies by White, Catherine Ann