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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
    What does valve mean?Get a quick, free translation! VALVE definition: 1. a device that opens and closes to control the flow of liquids or gases, or a similar structure…. Learn more.
    What does valved mean?Before they reached the double- valved door at the other end, Conan had mounted the other steps and was in the hall behind them. The big three- valved balloons of the bladdernut can sail either in the air, on the water, or over the frozen snow. Valved definition: having or furnished with valves. See examples of VALVED used in a sentence.
    What is the function of a valve?A valve is a device or natural object that regulates, directs, or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves provide several functions, including: All valves have the following basic parts: the body, bonnet, trim (internal elements), actuator, and packing. The basic parts of valves are: 1.
    Where does the word valve come from?The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll. The simplest, and very ancient, valve is simply a freely hinged flap which swings down to obstruct fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction.
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