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A heavy, sudden, and often noisy, blow or thump. The bounce burst open the door. Dryden.

A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper.

To bend the head, knee, or body, in token of reverence or submission; -- often with down. O come, let us worship and bow down: let us kneel before the Lord our maker. Ps. xcv. 6.

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 concave vessel of various forms (often approximately hemisherical), to hold liquids, etc. Brought them food in bowls of basswood. Longfellow.

ed. See Drift. Bowlder clay, the unstratified clay deposit of the Glacial or Drift epoch, often containing large numbers of bowlders. -- Bowlder wall, a wall constructed of large stones or bowlders.

for strangling offenders. Bowstring bridge, a bridge formed of an arch of timber or iron, often braced, the thrust of which is resisted by a tie forming a chord of the arch. -- Bowstring girder, an arched beam strengthened by a tie connecting its two ends. -- Bowstring hemp (Bot.), the tenacious fiber of the Sansevie…

A class of Molluscoidea having a symmetrical bivalve shell, often attached by a fleshy peduncle.

a manner intended to excite admiration, envy, or wonder; to talk boastfully; to boast; -- often followed by of; as, to brag of one's exploits, courage, or money, or of the great things one intends to do. Conceit, more rich in matter than in words, Brags of his substance, not of ornament. Shak.

An alloy (usually yellow) of copper and zinc, in variable proportion, but often containing two parts of copper to one part of zinc. It sometimes contains tin, and rarely other metals.

An interior sort comes from Jamaica, the timber of C. Braziliensis and C. crista. This is often distinguished as Braziletto , but the better kind is also frequently so named.

To impart, as news or information; to broach; -- with to, and often with a modified word implying some reserve; as, to break the news gently to the widow; to break a purpose cautiously to a friend.

low breast; the breast of a hill. Mountains on whose barren breast The laboring clouds do often rest. Milton.

A giant. [Spelt often Brobdignagian.]

A variety of enstatite, often having a bronzelike luster. It is a silicate of magnesia and iron, of the pyroxene family.

An imaginary good-natured spirit, who was supposed often to perform important services around the house by night, such as thrashing, churning, sweeping. [Scot.]

Intense excitement at the sight of deer or other game, such as often unnerves a novice in hunting. [Colloq.]

small dipterous insect of the genus Simulium, allied to the black fly of the North. It is often extremely abundant in the lower part of the Mississippi valley and does great injury to domestic animals, often killing large numbers of cattle and horses. In Europe the Columbatz fly is a species with similar habits. -- Bu…

Formed; shaped; constructed; made; -- often used in composition and preceded by the word denoting the form; as, frigate-built, clipper-built, etc. Like the generality of Genoese countrywomen, strongly built. Landor.

" or part whence the hair originates. -- Bulb of the spinal cord, the medulla oblongata, often called simply bulb. -- Bulb of a tooth, the vascular and nervous papilla contained in the cavity of the tooth.