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An engine moved by steam.

A steam engine having two or more steam cylinders in line, with a common piston rod.

An engine having a trunk piston, as most internal combustion engines.

An engine to raise water; or an engine moved by water; also, an engine or machine for extinguishing fires; a fire engine.

In gasoline-engine motor vehicles, the cooling of the cylinder by increasing its radiating surface by means of ribs or radiators, and placing it so that it is exposed to a current of air. Cf. Water cooling. -- Air"-cooled`, a.

ucting air; as the air vessels of insects, birds, plants, etc.; the air vessel of a pump, engine, etc. For the latter, see Air chamber. The air vessels of insects are called tracheæ, of plants spiral vessels.

o ammonia, or possessing its properties; as, an ammoniac salt; ammoniacal gas. Ammoniacal engine, an engine in which the vapor of ammonia is used as the motive force. -- Sal ammoniac Etym: [L. sal ammoniacus], the salt usually called chloride of ammonium, and formerly muriate of ammonia.

ntry, cavalry, and artillery, together with more or less numerous other branches, such as engineers, medical corps, etc., besides the staff organizations such as those of the pay and subsistence departments.

Caused, or operated on, by the atmosphere; as, an atmospheric effect; an atmospheric engine.

or device itself; as, the automatic feed of a lathe; automatic gas lighting; an automatic engine or switch; an automatic mouse.

A system (devised by Henri Pieper, a Belgian) of driving automobiles employing a gasoline engine and an auxiliary reversible dynamo. When there is an excess of power the dynamo is driven by the engine so as to charge a small storage battery; when there is a deficiency of power the dynamo reverses and acts as an auxilia…

for use on a street or roadway. Automobiles are usually propelled by internal combustion engines (using volatile inflammable liquids, as gasoline or petrol, alcohol, naphtha, etc.), steam engines, or electric motors. The power of the driving motor varies from about 4 to 50 H. P. for ordinary vehicles, ranging from the…

uter faces of a wall, or upon the haunches of an arch or vault. -- Back pressure. (Steam Engine) See under Pressure. -- Back rest, a guide attached to the slide rest of a lathe, and placed in contact with the work, to steady it in turning. -- Back slang, a kind of slang in which every word is written or pronounced b…

A premature explosion in the cylinder of a gas or oil engine during the exhaust or the compression stroke, tending to drive the piston in a direction reverse to that in which it should travel; also, an explosion in the exhaust passages of such ah engine.

To have or experience a back fire or back fires; -- said of an internal-combustion engine.

A wheel which imparts regularity to the movements of any engine or machine; a fly wheel.

steadiness, and security. It [piety] is the right ballast of prosperity. Barrow. Ballast engine, a steam engine used in excavating and for digging and raising stones and gravel for ballast. -- Ship in ballast, a ship carring only ballast.

An ancient military engine, in the form of a crossbow, used for hurling large missiles.

aining to the ballista, or to the art of hurling stones or missile weapons by means of an engine.

The science or art of hurling missile weapons by the use of an engine. Whewell.