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  2. Dictionary

    valve
    [valv]
    noun
    valve (noun) · valves (plural noun) · thermionic valve (noun) · thermionic valves (plural noun)
    1. a device for controlling the passage of fluid or air through a pipe, duct, etc., especially an automatic device allowing movement in one direction only:
      "a valve shuts off the flow from the boiler when the water is hot enough"
      • electronics
        BRITISH ENGLISH
        short for thermionic tube
      • music
        a cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes.
      • anatomy
        zoology
        a membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow.
      • zoology
        each of the halves of the hinged shell of a bivalve mollusk or brachiopod, or of the parts of the compound shell of a barnacle.
      • botany
        each of the halves or sections into which a dry fruit (especially a pod or capsule) dehisces.
    Origin
    late Middle English (denoting a leaf of a folding or double door): from Latin valva.
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  3. People also ask
    Is a valve a fitting?Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll.
    en.wikipedia.org
    What are valves used for?Valves have many uses, including controlling water for irrigation, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps in the home. Even aerosol spray cans have tiny valves built-in. Valves are also used in the military and transport sectors.
    What does valve mean?Get a quick, free translation! VALVE meaning: 1. a device that opens and closes to control the flow of liquids or gases, or a similar structure…. Learn more.
    What is a heart valve?A valve is a device attached to a pipe or a tube which controls the flow of air or liquid through the pipe or tube. A valve is a small piece of tissue in your heart or in a vein which controls the flow of blood and keeps it flowing in one direction only. He also has problems with a heart valve. 3. See also safety valve
     
  4. The meaning of VALVE is any of numerous mechanical devices by which the flow of liquid, gas, or loose material in bulk may be started, stopped, or regulated by a movable part that opens, shuts, or partially obstructs one or more ports or passageways; also : the movable part of such a device.
    www.merriam-webster.com/dictionary/valve
    valve noun [ C ] us / vælv / uk / vælv / Add to word list a device that opens and closes to control the flow of liquids or gases, or a similar structure in the heart and the veins that controls the flow of blood:
    dictionary.cambridge.org/us/dictionary/english/valve
    A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.
    en.wikipedia.org/wiki/Valve
    A valve is a mechanical device that blocks a pipe either partially or completely to change the amount of fluid that passes through it.
    www.explainthatstuff.com/valves.html
     
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