Brown Dwarf Definition

brown-dwarfs, brown-dwarf
noun
A celestial object consisting of a body of gas that gives off a small amount of radiation but lacks sufficient mass to initiate the nuclear fusion that characterizes true stars.
Webster's New World

Other Word Forms of Brown Dwarf

Noun

Singular:
brown dwarf
Plural:
brown-dwarfs, brown-dwarves

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brown dwarf