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Charcoal prepared for making powder.

A plume or tuft for the head composed of feathers, or of gems, etc. Prescott.

An instrument for boring holes, used in blasting.

A small square shield, formerly worn on the shoulders of knights, -- being the prototype of the modern epaulet. Fairholt.

A contraction for are not and am not; also used for is not. [Colloq. or llliterate speech]. See An't.

Any aëriform body; a gas; as, oxygen was formerly called vital air. [Obs.]

A kind of atomizer for applying liquid coloring matter in a spray by compressed air.

A cavity containing air to act as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine.

Any device, as a balloon, aëroplane, etc., for floating in, or flying through, the air.

A kind of gun in which the elastic force of condensed air is used to discharge the ball. The air is powerfully compressed into a reservoir attached to the gun, by a condensing pump, and is controlled by a valve actuated by the trigger.

A walk or a ride in the open air; a short excursion for health's sake.

A path through the air made easy for aërial navigation by steady winds.

A pipe for the passage of air; esp. a ventilating pipe.

A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air of force in into a closed space.

A passage, usually vertical, for admitting fresh air into a mine or a tunnel.

A stove for heating a current of air which is directed against its surface by means of pipes, and then distributed through a building.

s the air vessels of insects, birds, plants, etc.; the air vessel of a pump, engine, etc. For the latter, see Air chamber. The air vessels of insects are called tracheæ, of plants spiral vessels.

Improperly used also for the have; -- as in the phrases, a church with three aisles, the middle aisle.

Earlier form of Acknow. [Obs.] To be aknow, to acknowledge; to confess. [Obs.]

A box or vessel for holding odoriferous ointments, etc.; -- so called from the stone of which it was originally made. Fosbroke.