A.damper, extinguisher, cover of a stove, Ar. Nu.96, Av.1001, Arist.Juv.470a9, PA654a7; as a votive offering, IG 22.1425.411.
II. hydraulic instrument in which air is pent up: regulator, Hero Spir.1.42, al.; air-chamber in a water-organ, Ph.Bel. 77.44.
III. muzzle for horses, Ar.Fr.60, Com.Adesp.664.