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er; -- either affirmatively, by positive act, or negatively, by neglecting to restrain or prevent.

An embankment to prevent inundation; as, the levees along the Mississippi; sometimes, the steep bank of a river. [U. S. ]

A thread or string for tying the blood vessels, particularly the arteries, to prevent hemorrhage.

ghtning arrester (Telegraphy), a device, at the place where a wire enters a building, for preventing injury by lightning to an operator or instrument. It consists of a short circuit to the ground interrupted by a thin nonconductor over which lightning jumps. Called also lightning discharger. -- Lightning bug (Zoöl.),…

lank forming part of the lining of a ship's floor immediately above the timbers, so as to prevent the limbers from becoming clogged. -- Limber box or chest (Mil.), a box on the limber for carrying ammunition. -- Limber rope, Limber chain or Limber clearer (Naut.), a rope or chain passing through the limbers of a ship…

A pin used to prevent the wheel of a vehicle from sliding off the axletree.

A medicine which tends to prevent stone in the bladder.

rom. The process depends, in the main, upon the antipathy between grease and water, which prevents a printing ink containing oil from adhering to wetted parts of the stone not covered by the design. See Lithographic limestone, under Lithographic.

A place from which egress is prevented, as by a lock. Dryden.

A weight or block near the free end of a hoisting rope to prevent it from being drawn through the sheave. Log board (Naut.), a board consisting of two parts shutting together like a book, with columns in which are entered the direction of the wind, course of the ship, etc., during each hour of the day and night. These…

To prevent from gaining or obtaining. O false heart ! thou hadst almost betrayed me to eternal flames, and lost me this glory. Baxter. To lose ground, to fall behind; to suffer gradual loss or disadvantage. -- To lose heart, to lose courage; to become timid. "The mutineers lost heart." Macaulay. -- To lose one's head…

One of a number of riotous persons in England, who for six years (1811-17) tried to prevent the use of labor-saving machinery by breaking it, burning factories, etc.; -- so called from Ned Lud, a half-witted man who some years previously had broken stocking frames. J. & H. Smith. H. Martineau.

The fore part of the deck, having a bulkhead athwart ships high enough to prevent water which enters the hawse holes from running over it.

The margosa oil . . . is a most valuable balsam for wounds, having a peculiar smell which prevents the attacks of flies. Sir S. Baker.

To cover, as part of a rope, with marline, marking a pecular hitch at each turn to prevent unwinding. Marling spike. (Naut.) See under Marline.

ne composed of two strands a little twisted, used for winding around ropes and cables, to prevent their being weakened by fretting. Marline spike, Marling spike (Naut.), an iron tool tapering to a point, used to separate the strands of a rope in splicing and in marling. It has an eye in the thick end to which a lanyard…

ngs, through which the reins pass. It is intended to hold down the head of the horse, and prevent him from rearing.

The science which relates to the prevention, cure, or alleviation of disease.

The suppression of a day in the calendar to prevent the date of the new moon being set a day too late, or the suppression of the bissextile day once in 134 years. The opposite to this is the proemptosis, or the addition of a day every 330 years, and another every 2,400 years.

antry in Ireland about 1843, principally for the purpose of intimidating law officers and preventing the service of legal writs. Its members disguised themselves in the dress of women. (b) A member of a similar association of Irishmen organized in the anthracite coal region of Pennsylvania, about 1854, for the purpose…