Arc-tū'rus, n.
n. [Lat. arcturus, Gr. ἀρκτοῦρος, bearward, equiv. to Ἀρκτοφύλαξ, from ἄρκτος and οὖρος, guard. See ARCTIC.] (Astron.) A fixed star of the first magnitude in the constellation Boötes.
n. [Lat. arcturus, Gr. ἀρκτοῦρος, bearward, equiv. to Ἀρκτοφύλαξ, from ἄρκτος and οὖρος, guard. See ARCTIC.] (Astron.) A fixed star of the first magnitude in the constellation Boötes.