Lewis & Short

3. Gallus, i, m., = Γάλλος Strab.,

  1. I. a tributary of the Sagaris of Phrygia and Bithynia, whose water, according to the fable, made those who drank it mad, now Kadsha Su or Gökssu, Ov. F. 4, 364; Plin. 5, 32, 42, § 147; 6, 1, 1, § 4; 31, 2, 5, § 9; Claud. ap. Ruf. 2, 263.
  2. II. Derivv.
    1. A. Galli, ōrum, m., the priests of Cybele, so called because of their raving, Ov. F. 4, 361 sq.; Plin. 5, 32, 42, § 146; 11, 49, 109, § 261; 35, 12, 46, § 165; Paul. ex Fest. p. 95 Müll.; Hor. S. 1, 2, 121.
      In sing.: Gallus, i, m., a priest of Cybele, Mart. 3, 81; 11, 74; cf. Quint. 7, 9, 2: resupinati cessantia tympana Galli, Juv. 8, 176.
      And satirically (on account of their emasculated condition), in the fem.: Gallae, ārum, Cat. 63, 12, and 34.
    2. B. Gallĭcus, a, um, adj.
      1. 1. Of or belonging to the river Gallus, poet. i. q. Phrygian, Trojan: miles, Prop. 2, 13. 48 (3, 5, 32 M.).
      2. 2. (Acc. to II. A., of or belonging to the priests of Cybele; hence, transf.) Of or belonging to the priests of Isis, Gallic: turma, the troop of the priests of Isis, Ov. Am. 2, 13, 18.