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Very heavy; weighty; as, a ponderous shield; a ponderous load; the ponderous elephant. The sepulcher . . . Hath oped his ponderous and marble jaws. Shak.

, furnished with cranes, capstans, and other machinery, used in careening ships, raising weights, drawing piles, etc., chiefly in the Mediterranean; a lighter. Pontoon bridge, a bridge formed with pontoons. -- Pontoon train, the carriages of the pontoons, and the materials they carry for making a pontoon bridge.…

which has only two wheels. -- Pony truss (Bridge Building), a truss which has so little height that overhead bracing can not be used.

A Russian weight, equal to forty Russian pounds or about thirty-six English pounds avoirdupois.

A species of shark (Lamna cornubica), about eight feet long, having a pointed nose and a crescent-shaped tail; -- called also mackerel shark. [Written also probeagle.]

onate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium).

A certain specified weight; especially, a legal standard consisting of an established number of ounces.

acquire by the of that time a velocity of one foot per second. It is about equal to the weight of half an ounce, and is 13,825 dynes.

A person or thing, so called with reference to a certain number of pounds in value, weight, capacity, etc.; as, a cannon carrying a twelve-pound ball is called a twelve pounder.

orce producing motion or pressure; as, the power applied at one and of a lever to lift a weight at the other end.

Artful; deceitful; skillful. [Obs.] "Cunning sleights and practick knavery." Spenser.

sanction, a solemn ordinance or decree issued by the head or legislature of a state upon weighty matters; -- a term derived from the Byzantine empire. In European history, two decrees under this name are particularly celebrated. One of these, issued by Charles VII. of France, A. D. 1438, was the foundation of the liber…

tituents of didymium; - - so called from the green color of its salts. Symbol Ps. Atomic weight 143.6.

To throw headlong; to cast down from a precipice or height. She and her horse had been precipitated to the pebbled region of the river. W. Irving.

Heavy with important contents, significance, or issue; full of consequence or results; weighty; as, pregnant replies. " A pregnant argument." Prynne. " A pregnant brevity." E. Everett.

The quality or state of being preponderant; superiority or excess of weight, influence, or power, etc.; an outweighing. The mind should . . . reject or receive proportionably to the preponderancy of the greater grounds of probability. Locke. In a few weeks he had changed the relative position of all the states in Europ…

ting; outweighing; overbalancing; -- used literally and figuratively; as, a preponderant weight; of preponderant importance. -- Pre*pon"der*ant*ly, adv.

To outweigh; to overpower by weight; to exceed in weight; to overbalance. An inconsiderable weight, by distance from the center of the balance, will preponderate greater magnitudes. Glanvill.

To urge, or act upon, with force, as weight; to act upon by pushing or thrusting, in distinction from pulling; to crowd or compel by a gradual and continued exertion; to bear upon; to squeeze; to compress; as, we press the ground with the feet when we walk; we press the couch on which we repose; we press substances wit…

Legerdemain; sleight of hand; juggling.