2. Anything that causes a clacking noise, as the clapper of a mill, or a clack valve.

3. Continual or importunate talk; prattle; prating. Whose chief intent is to vaunt his spiritual clack. South. Clack box (Mach.), the box or chamber in which a clack valve works. — Clack dish, a dish with a movable lid, formerly carried by beggars, who clacked the lid to attract notice. Shak. Clack door (Mining), removable cover of the opening through which access is had to a pump valve. — Clack valve (Mach.), a valve; esp. one hinged at one edge, which, when raised from its seat, falls with a clacking sound.

CLACKER
Clack"er, n.

1. One who clacks; that which clacks; especially, the clapper of a mill.

2. A claqueur. See Claqueur.

CLAD
Clad, v.t

Defn: To clothe. [Obs.] Holland.

CLAD
Clad,

Defn: imp. & p. p. of Clothe.

CLADOCERA
Cla*doc"e*ra, n. pl. Etym: [NL., fr. Gr. (Zoöl.)