sībĭlātĭo (collat. form sĭfĭlātĭo, Non. 531, 4), ōnis, f. [sibilo], a sibilation, hissing (late Lat.): serpentium, Vulg. Sap. 17, 9: vel stridor, Cael. Aur. Tard. 2, 14, 198.