protostar

noun

pro·​to·​star ˈprō-tō-ˌstär 

: a cloud of gas and dust in space believed to develop into a star

Examples of protostar in a Sentence

Recent Examples on the Web

Methanol masers have previously been detected in planet-forming disks around turbulent high-mass protostars, but COMPASS’ observations are the first detection of them around calmer lower-mass protostars. — Keith Cooper, Space.com, 15 Oct. 2026

Once that happens, a protostar becomes a bona fide star and lives out its celestial life. — Mike Lynch, Twin Cities, 19 July 2026

The protostar doesn’t contract, though, since it’s still held up by gas pressure. — Big Think, 24 Apr. 2026

Word History

First Known Use

1947, in the meaning defined above

Rhymes for protostar

• abattoir
• alcazar
• autocar
• avatar
• belshazzar
• caviar
• caviare
• cinnabar
• commissar
• condylar
• deodar
• handlebar