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A method of treatment, devised by Pasteur, for preventing certain diseases, as hydrophobia, by successive inoculations with an attenuated virus of gradually increasing strength.

A process devised by Pasteur for preventing or checking fermentation in fluids, such as wines, milk, etc., by exposure to a temperature of 140º F., thus destroying the vitality of the contained germs or ferments.

, struck by the clapper. Paunch mat (Naut.), a thick mat made of strands of rope, used to prevent the yard or rigging from chafing.

other part, as a ratchet wheel, in such a manner as to permit motion in one direction and prevent it in the reverse, as in a windlass; a catch, click, or detent. See Illust. of Ratchet Wheel. [Written also paul, or pall.] Pawl bitt (Naut.), a heavy timber, set abaft the windlass, to receive the strain of the pawls. --…

men appointed by a trades union, or other labor organization, to intercept outsiders, and prevent them from working for employers with whom the organization is at variance. [Cant]

A facing of stone laid upon a bank to prevent wear by tides or currents. Pitching piece (Carp.), the horizontal timber supporting the floor of a platform of a stairway, and against which the stringpieces of the sloping parts are supported.

owed by law; -- so called from Samuel Plimsoll, by whose efforts the act of Parliament to prevent overloading was procured.

be a law, in like manner as if he had signed it, unless the Congress by their adjournment prevent its return, in which case it shall not be a law." Also, an analogous retention of a bill by a State governor.

A contrivance to prevent an animal from leaping or breaking through fences. It consists of a yoke with a pole inserted, pointed forward. [U.S.] Poke bonnet, a bonnet with a straight, projecting front.

tion of rights, order, cleanliness, health, etc., and for the enforcement of the laws and prevention of crime; the administration of the laws and regulations of a city, incorporated town, or borough.

n or of timbers pointed with iron, hung over the gateway of a fortress, to be let down to prevent the entrance of an enemy. "Let the portcullis fall." Sir W. Scott. She . . . the huge portcullis high updrew. Milton.

A bulkhead in the hold of a vessel, to prevent grain, etc., from shifting. Pouch mouth, a mouth with blubbered or swollen lips.

A fine powder, as of sandarac, or cuttlefish bone, -- formerly used to prevent ink from spreading on manuscript.

Previous caution or care; caution previously employed to prevent mischief or secure good; as, his life was saved by precaution. They [ancient philosophers] treasured up their supposed discoveries with miserable precaution. J. H. Newman.

To shut out by anticipative action; to prevent or hinder by necessary consequence or implication; to deter action of, access to, employment of, etc.; to render ineffectual; to obviate by anticipation. This much will obviate and preclude the objections. Bentley.

Prevertebral.

To hinder; to debar; to prevent; to preclude. Gates of burning adamant, Barred over us, prohibit all egress. Milton.

A figure by which objections are anticipated or prevented. Abp. Bramhall.

To support, or prevent from falling, by placing something under or against; as, to prop up a fence or an old building; (Fig.) to sustain; to maintain; as, to prop a declining state. Shak. Till the bright mountains prop the incumbent sky. Pope. For being not propp'd by ancestry. Shak. I prop myself upon those few suppor…

A medicine which preserves or defends against disease; a preventive.