cir·​cum·​stel·​lar ˌsər-kəm-ˈste-lər How to pronounce circumstellar (audio)
: surrounding or occurring in the vicinity of a star
circumstellar dust

Example Sentences

Recent Examples on the Web One possibility is that a passing star may have knocked Sedna out of the Oort Cloud — a circumstellar cloud of icy space rocks orbiting far from the sun — and onto its current orbit. Eric Betz, Discover Magazine, 2 Feb. 2020 This rotation of the cloud material leads to the formation of a circumstellar disk of matter surrounding the nascent star, which then becomes a crucible for planet formation. Katelyn Allers, Scientific American, 1 Aug. 2021 When stars are born a disk of gas and dust envelops them, forming what is known as a circumstellar disk. Shannon Stirone, Discover Magazine, 18 Nov. 2015 In addition, intense surface winds cause a gaseous cloud known as a circumstellar envelope to form around the star. Jennifer Ouellette, Ars Technica, 29 Mar. 2022 The data revealed evidence of dense circumstellar material around the star at the time of the explosion. Julia Musto, Fox News, 14 Jan. 2022 Hubble was able to spot circumstellar material around the star shortly after the explosion. Ashley Strickland, CNN, 21 Oct. 2021 As material continues to gently fall onto the central proto-star, a circumstellar disk emerges around it. Ethan Siegel, Forbes, 16 Apr. 2021 Planets form from a disk of gas and dust around a star, called the circumstellar disk. Ashley Strickland, CNN, 14 Sep. 2020 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'circumstellar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1951, in the meaning defined above

Time Traveler
The first known use of circumstellar was in 1951

Dictionary Entries Near circumstellar

Cite this Entry

“Circumstellar.” Dictionary, Merriam-Webster, Accessed 6 Jun. 2023.

Last Updated: - Updated example sentences
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