a giant, orange, variable star in the constellation Boötes, the brightest star in the N celestial sphere: magnitude, ?0.05
Origin of ArcturusClassical Latin ; from Classical Greek Arktouros, guardian of the bear ; from arktos, a bear + ouros, a guard ; from Indo-European an unverified form woros, heedful ; from base an unverified form wer- (see warn): so named from its position behind the tail of Ursa Major in ancient diagrams of the constellation
The fourth brightest star in the sky and the brightest star in the constellation Bo&odie;tes, approximately 36 light years from Earth.
Origin of ArcturusMiddle English, from Latin Arct&umacron;rus, from Greek Arktouros : arktos, bear; see &rlowring;tko- in Indo-European roots + ouros, guard (from its position behind Ursa Major); see wer-3 in Indo-European roots.
Borrowed from Latin Arctūrus.