brown dwarf

noun
|Updated on: 9 Jun 2018

Definition of brown dwarf

: a celestial object that is much smaller than a normal star and has insufficient mass to sustain nuclear fusion but that is hot enough to radiate energy especially at infrared wavelengths

Recent Examples of brown dwarf from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brown dwarf.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of brown dwarf

1975

in the meaning defined above

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