Lewis & Short

mūgītus, ūs, m. [1. mugio], a lowing, bellowing (class.).

  1. I. Lit.: mugitusque boum, Verg. G. 2, 470: edere, to utter lowings, to low, Ov. M. 7, 597: dare, id. F. 1, 560: tollere, Verg. A. 2, 223.
  2. II. Transf., a bellowing, rumbling, roaring, loud noise: mugitus terrae, Cic. Div. 1, 18: nemorum, Plin. 18, 35, 86, § 360; Stat. Th. 10, 263: labyrinthi, Juv. 1, 53.