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dwarf star

Today it means: A star that is located in the main sequence in the Hertzsprung-Russell diagram, though generally excluding the small minority which fall in the blue band due to their large size and high luminosity; fuses hydrogen into helium in its core. Full definition →

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The story

From dwarf + star. Compare West Frisian dwerchster (“dwarf star”), Dutch dwergster (“dwarf star”), German Zwergstern (“dwarf star”), Danish dværgstjerne (“dwarf star”), Swedish dvärgstjärna (“dwarf star”), Icelandic dvergstjarna (“dwarf star”).

Etymology from Wiktionary, CC BY-SA 4.0.