Cepheus

American  

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

noun

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.

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Cepheus ¹ British  

/ ˈsiːfjuːs /

noun

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

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Cepheus ² British  

/ ˈsiːfjuːs /

noun

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

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Cepheus Scientific  

/ sē′fyo̅o̅s′,-fē-əs /

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

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Other Word Forms

• Cepheid
  adjective

Etymology

Origin of Cepheus

from Latin Cēpheus named after the mythical king

Example Sentences

Rigetti plans to enhance its Cepheus system to achieve a median 99.5% two-qubit gate fidelity later this year.

From Barron's • Apr. 8, 2026

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

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

It is at a distance of about 18 million light-years, in the direction of the constellations Cepheus and Cygnus.

From Textbooks • Oct. 13, 2016

The offended nymphs complained to Neptune, who sent a sea-monster to ravage the dominions of Cepheus.

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