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brown dwarf

noun
🔊/ˌbraʊn ˈdwɔːf/
🔊/ˌbraʊn ˈdwɔːrf/
(astronomy天文学)
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  1. an object in space that is between a large planet and a small star in size, and produces heat棕矮星（体积在大行星和小星体之间，产生热）