1. A designated limit beyond which something cannot function or must be terminated.
2. A device that terminates the flow in a pipe. cut off, cut-off
3. The time when something, such as water, electricity, or money, is cut off is the cutoff, cutoff point, or cutoff date.
ETYM French piston; cf. Italian pistone piston, also pestone a large pestle; all from Latin pinsere, pistum, to pound, to stamp. Related to Pestle, Pistil.
A part of a machine that has a plunging or thrusting motion; SYN. plunger.
Barrel-shaped device used in reciprocating engines (steam, gasoline, diesel oil) to harness power. Pistons are driven up and down in cylinders by expanding steam or hot gases. They pass on their motion via a connecting rod and crank to a crankshaft, which turns the driving wheels. In a pump or compressor, the role of the piston is reversed, being used to move gases and liquids. See also internal-combustion engine.
ETYM Dim. of throat. Related to Throat.
The throttle valve on an engine, used to control the speed by regulating the amount of fuel injected into the system.
valve / vælv /
Množina reči valve je valves.
ETYM Latin valva the leaf, fold, or valve of a door: cf. French valve.
1. A structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it.
2. Any mechanical device for controlling the flow of a fluid.
3. Device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone.
1. A fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt; SYN. volcano, crater.
2. An opening for the escape of gas or air; SYN. venthole, blowhole.
3. External opening of urinary or genital system of a lower vertebrate.