Lewis & Short

sanguĭno, āre, v. n. [sanguis].

  1. I. Lit., to be bloody; to bleed, run with blood (postAug. and very rare): femina sanguinans (in menstruation), Tert. adv. Marc. 4, 20: lacertos sanguinantes porrigere, Quint. Decl. 10, 8; 10, 18.
    1. B. Transf., to be of a blood-color: unda purpureis profundis, Sol. poët. in Anthol. Lat. II. p. 384 Burm. (234 Meyer): colubrum veneno noxio colla sanguinantem, App. M. 5, p. 160, 20 (cf.: sanguineae jubae anguium, Verg. A. 2, 207).
  2. * II. Trop., to be blood-thirsty, sanguinary: sanguinans eloquentia (sc. delatorum), Tac. Or. 12.