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Of or pertaining to mines; as, mining engineer; mining machinery; a mining region. Mining engineering. See the Note under Engineering.

nge place or posture; susceptible of motion; not fixed or stationary; as, a movable steam engine.

ort outlet, or inlet, pipe projecting from the end or side of a hollow vessel, as a steam-engine cylinder or a steam boiler.

A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery. Fairholt.

The schoolmen were like astronomers, which did feign eccentrics, and epicycles, and such engines of orbs. Bacon. You seem to me as Dian in her orb. Shak. In orbs Of circuit inexpressible they stood, Orb within orb. Milton.

ng of any complex machine; as, the cylinder, valves, crank, etc., are organs of the steam engine.

That oscillates; vibrating; swinging. Oscillating engine, a steam engine whose cylinder oscillates on trunnions instead of being permanently fixed in a perpendicular or other direction. Weale.

A four-stroke cycle for internal-combustion engines consisting of the following operations: First stroke, suction into cylinder of explosive charge, as of gas and air; second stroke, compression, ignition, and explosion of this charge; third stroke (the working stroke), expansion of the gases; fourth stroke, expulsion…

ts outward way. Dryden. -- Out"ward*ly, adv. -- Out"ward*ness, n. Outward stroke. (Steam Engine) See under Stroke.

iving passage to air, water, or steam; as, to pack a joint; to pack the piston of a steam engine.

A vehicle, as a traction engine, having such pedrails.

An ancient war engine for hurling stones.

Pile cap, a beam resting upon and connecting the heads of piles. -- Pile driver, or Pile engine, an apparatus for driving down piles, consisting usually of a high frame, with suitable appliances for raising to a height (by animal or steam power, the explosion of gunpowder, etc.) a heavy mass of iron, which falls upon…

ad, ship biscuit. -- Pilot cloth, a coarse, stout kind of cloth for overcoats. -- Pilot engine, a locomotive going in advance of a train to make sure that the way is clear. -- Pilot fish. (Zoöl) (a) A pelagic carangoid fish (Naucrates ductor); -- so named because it is often seen in company with a shark, swimming ne…

y which it contains. Pipe fitter, one who fits pipes together, or applies pipes, as to an engine or a building. -- Pipe fitting, a piece, as a coupling, an elbow, a valve, etc., used for connecting lengths of pipe or as accessory to a pipe. -- Pipe office, an ancient office in the Court of Exchequer, in which the cle…

ing within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for other purposes. Piston head (Steam Eng.), that part of a piston which is made fast to the piston rod. -- Piston rod, a rod by which a…

one half pitch; whole pitch; or by the height in parts of the half span, especially among engineers; or by degrees, as a pitch of 30°, of 45°, etc.; or by the rise and run, that is, the ratio of the height to the half span; as, a pitch of six rise to ten run. Equilateral pitch is where the two sloping sides with the sp…

, plasmids often carry the genes for antibiotic resistance; they are exploited in genetic engineering as the vehicles for introduction of extraneous DNA into cells, to alter the genetic makeup of the cell. The cells thus altered may produce desirable proteins which are extracted and used; in the case of genetically alt…

g rod (Steam Eng.) , a rod attached to the beam for working the valves, as in the Cornish engine. -- Plug valve (Mech.), a tapering valve, which turns in a case like the plug of a faucet.

bucket, a piston, without a valve, in a pump. -- Plunger pole, the pump rod of a pumping engine. -- Plunger pump, a pump, as for water, having a plunger, instead of a piston, to act upon the water. It may be single-acting or double- acting