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supergiant star

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noun
  1. Astronomy. an exceptionally luminous star whose diameter is more than 100 times that of the sun, as Betelgeuse or Antares.

Origin of supergiant star

First recorded in 1925–30
Also called supergiant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018