CLACK n.
x (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 hin…
COMMODITY n.
h affords convenience, advantage, or profit, especially in commerce, including everything movable that is bought and sold (except animals), -- goods, wares, merchandise, produce of land and manufactures, etc.
DAMPER n.
That which damps or checks; as: (a) A valve or movable plate in the flue or other part of a stove, furnace, etc., used to check or regulate the draught of air. (b) A contrivance, as in a pianoforte, to deaden vibrations; or, as in other pieces of mechanism, to check some action at a particular time. Nor did Sabrina's p…