Lewis & Short

† arctūrus, i, m., = ἀρκτοῦρος.

  1. I. As a star.
    1. A. The brightest star in Bootes,, whose rising and setting was supposed to portend tempestuous weather (Plaut. Rud. prol. 71): stella micans radiis, Arcturus, Cic. Arat. 99; id. N. D. 2, 42, 110 (as a transl. of Arat. 95); cf. Hyg. Fab. 130; id. Astr. 2, 4; Verg. A. 1, 744; Vulg. Job, 9, 6; 37, 9; ib. Amos, 5, 8; introduced in Plaut. Rud. as Prologus.
      Transf.
    2. B. The whole constellation (syn.: Bootes, Arctophylax), Verg. G. 1, 204 Voss.
    3. C. The rising of Arcturus, Verg. G. 1, 68.
  2. II. A plant, v. arction.