Cassiopeia
noun
Cas·si·o·pe·ia
ˌka-sē-ə-ˈpē-ə 
1
: the wife of King Cepheus who gives birth to Andromeda and is later changed into a constellation
2
[Latin (genitive Cassiopeiae), from Greek Kassiopeia]
: a northern constellation between Andromeda and Cepheus
Examples of Cassiopeia in a Sentence
Recent Examples on the Web
The bubble-like form of the Garlic Nebula lies within the Milky Way some 9,132 light-years from Earth in the constellation Cassiopeia.
—
Anthony Wood, Space.com, 24 Oct. 2025
The giant ugly sea monster Cetus was closing in on a beach where Princess Andromeda was chained to a rock by her own parents, Cassiopeia and Cepheus, the king and queen of ancient Ethiopia.
—Mike Lynch, Twin Cities, 19 Oct. 2025
As the Big Dipper gets lower on the horizon, Cassiopeia gets higher, with both completing one rotation of Polaris every 24 hours.
—Jamie Carter, Forbes.com, 16 Sep. 2025
Luna Sulien Venus Nyx Cosmo Atom Rigel Stella Nebula
Apollo
Vega
Andromeda
Celestia
Sol
Lyra
Comet
Artemis
Sirius
Cassiopeia
Galaxy
Cosima
Skye
More Futuristic Baby Names Inspired by Nature
Nature is majestic and wild—a constant source of inspiration for adventurous, courageous spirits.
—Fiona Tapp, Parents, 10 Apr. 2025
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Anthony Wood, Space.com, 24 Oct. 2025
The giant ugly sea monster Cetus was closing in on a beach where Princess Andromeda was chained to a rock by her own parents, Cassiopeia and Cepheus, the king and queen of ancient Ethiopia.
—Mike Lynch, Twin Cities, 19 Oct. 2025
As the Big Dipper gets lower on the horizon, Cassiopeia gets higher, with both completing one rotation of Polaris every 24 hours.
—Jamie Carter, Forbes.com, 16 Sep. 2025
Luna Sulien Venus Nyx Cosmo Atom Rigel Stella Nebula
Apollo
Vega
Andromeda
Celestia
Sol
Lyra
Comet
Artemis
Sirius
Cassiopeia
Galaxy
Cosima
Skye
More Futuristic Baby Names Inspired by Nature
Nature is majestic and wild—a constant source of inspiration for adventurous, courageous spirits.
—Fiona Tapp, Parents, 10 Apr. 2025
Cite this Entry
“Cassiopeia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Cassiopeia. Accessed 31 Oct. 2025.
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Cassiopeia
noun
Cas·si·o·pe·ia
ˌkas-ē-ə-ˈpē-(y)ə
: a northern group of stars between Andromeda and Cepheus
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