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ALL meanings of arcturus

Arc·tu·rus
A a
  • noun arcturus the brightest star in the constellation Boötes: a red giant. Visual magnitude: –0.4; spectral type: K2III; distance: 37 light years 3
  • noun arcturus a giant, orange star in the constellation Boötes, the brightest star in the N celestial sphere: magnitude, -0.04 3
  • noun arcturus a first-magnitude star in the constellation Boötes. 1
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