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

Meteors whose paths extended backward intersect at a spot near the Perseid-Cassiopeia border not far from the famous Double Cluster in Perseus. — Joe Rao, Space.com, 18 July 2026

The imagery shows the supernova remnant Cassiopeia A, the dusty nebula NGC 3603, the spiral galaxy Messier 94 and the galaxy cluster ZwCl 0024+1652. — Stephanie Pappas, Scientific American, 4 July 2026

About 11,000 light-years away from Earth, the supernova Cassiopeia A’s X-rays (seen above) are rendered in blue and purple, while infrared wavelengths are shown in red and white using data from JWST. — Andrew Paul, Popular Science, 2 July 2026

That steam is the brightest part of the Milky Way band that runs from Sagittarius in the south to the constellation Cassiopeia in the north. — Mike Lynch, Twin Cities, 31 May 2026

Word History

Etymology

Latin, from Greek Kassiopeia

First Known Use

1596, in the meaning defined at sense 1

Rhymes for Cassiopeia

• atypia
• cinerea
• cytherea
• diarrhea
• diarrhoea
• dulcinea
• eimeria
• eulalia
• galatea
• galleria
• gonorrhea
• gonorrhoea

Kids Definition

Cassiopeia

noun

Cas·​si·​o·​pe·​ia ˌkas-ē-ə-ˈpē-(y)ə 

: a northern group of stars between Andromeda and Cepheus