thĭăsus (thyăsus), i, m., = θίασος,
the Bacchic dance , a dance performed in honor of Bacchus, Verg. E. 5, 30; id. A. 7, 581; Stat. S. 3, 1, 41; Cat. 63, 28; 64, 253.
thiasus (thy-) ī, m , θίασος, a dance in honor of Bacchus, Bacchic dance, V.—A dancing band, chorus...
An Elementary Latin Dictionary