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An instrument for regulating the electro-motive force in an alternating-current circuit; -- so called because used to "boost", or raise, the pressure in the circuit.

To make a hole or perforation with, or as with, a boring instrument; to cut a circular hole by the rotary motion of a tool; as, to bore for water or oil (i. e., to sink a well by boring for water or oil); to bore with a gimlet; to bore into a tree (as insects).

eneath the contents and supports them, as the part of a chair on which a person sits, the circular base or lower head of a cask or tub, or the plank floor of a ship's hold; the under surface. Barrels with the bottom knocked out. Macaulay. No two chairs were alike; such high backs and low backs and leather bottoms and w…

A molding, the convexity of which is one fourth of a circle, being a member just below the abacus in the Tuscan and Roman Doric capital; a torus; an ovolo.

said of natural or of moral objects; to lie along, or form, a boundary of; to inclose; to circumscribe; to restrain; to confine. Where full measure only bounds excess. Milton. Phlegethon . . . Whose fiery flood the burning empire bounds. Dryden.

the head in token of salutation, civility, or assent; to make bow. Admired, adored by all circling crowd, For wheresoe'er she turned her face, they bowed. Dryden.

A small pair of compasses, one leg of which carries a pencil, or a pen, for drawing circles. Its legs are often connected by a bow- shaped spring, instead of by a joint.

a vessel) on the other tack by veering her short round on her heel; -- so called from the circumstance of bracing the head yards abox (i. e., sharp aback, on the wind). Totten.

An ornamental band or ring, for the wrist or the arm; in modern times, an ornament encircling the wrist, worn by women or girls.

projection at the top on one side instead of a head; also, a small wire nail, with a flat circular head; sometimes, a small, tapering, square-bodied finishing nail, with a countersunk head.

brazened it out before Mrs. Wygram, but inwardly she was resolved to be a good deal more circumspect. W. Black.

eel turns. It is closely adapted to the curve of the wheel through about a quarter of its circumference, and prevents the escape of the water until it has spent its force upon the wheel. See Breast wheel.

device to measure the resistance of a wire or other conductor forming part of an electric circuit.

Crowned; having the head encircled as with a diadem. Shak.

a similar one by the friction of bristles or something brushlike or soft attached to the circumference.

oad-faced hammer, used in bucking or breaking up ores. -- Bucking kier (Manuf.), a large circular boiler, or kier, used in bleaching. -- Bucking stool, a washing block.

A block of wood or plate of iron made to fit a hawse hole, or the circular opening in a half-port, to prevent water from entering when the vessel pitches. Blind buckler (Naut.), a solid buckler. -- Buckler mustard (Bot.), a genus of plants (Biscutella) with small bright yellow flowers. The seed vessel on bursting rese…

A small circular or oval wooden block without sheaves, having a groove around it and a hole through it, used for connecting rigging.

A small circular saw.

A circular saw; -- so called from the buzzing it makes when running at full speed.