ARCTURUS, in astronomy, a fixed star, of the first magnitude, in the constellation of Arctophylax, or Bootes. The word is formed of αρκτος, bear, and ουρα, tail, q. d. bear's tail, as being very near it. This star
Arcuatio. star was known to the ancients, as in the following verse of Virgil:
Arcturum, pluviasque Hyades, geminosque Triones,
See also Job ix. 9. xxxviii. 32.