brown dwarf
noun
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
Read the Latest from M-W
First Known Use of brown dwarf
1975
Learn More about brown dwarf
-
Nglish: Translation of brown dwarf for Spanish speakers Britannica.com: Encyclopedia article about brown dwarf
Seen and Heard
What made you want to look up brown dwarf? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!