BOB半岛

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        valve

         
         
        pronunciation:
        vaelv
        features:
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        part of speech: noun
        definition 1: a device that controls the flow of a liquid or gas through a pipe or tube.
        The plumber closed the valve before repairing the faucet.
         
        similar words:
        cock, tap
        definition 2: a flap that controls the flow of a liquid in the body.
        Heart valves control the flow of blood through the heart.
        similar words:
        quality
        definition 3: a device that controls the flow of air in a musical instrument such as the trumpet. A valve makes the sound of an instrument higher or lower.
        derivations: valveless (adj.), valvelike (adj.)
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          instrument, mollusk, tool, water