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ball cock a device used to regulate the supply of water in a tank or toilet, consisting of a lever connected to a floating ball that shuts a valve when raised and opens it when lowered.
float a hollow ball used to operate a valve or gauge, as in a toilet tank or gas tank. [1/14 definitions]
float valve a valve controlled by a floating device.
hydrant an upright pipe with a valve from which water can be drawn from a water main.
insufficiency failure of a body part, such as a heart valve, to function normally or adequately. [1/2 definitions]
mitral pertaining to or near the mitral valve of the heart. [1/2 definitions]
mitral valve the heart valve located between the left auricle and ventricle that prevents blood from flowing back into the auricle when the heart contracts.
needle valve a valve having a slender point that fits precisely into a conical seat, for accurately regulating the flow of fluid, as in a carburetor.
PCV valve a one-way valve that regulates the flow of engine exhaust fumes into an auto engine's cylinders, as part of a pollution control system.
petcock a small valve or faucet used to drain from or lower the pressure in a pipe, boiler, steam engine, or the like.
poppet an intake or exhaust valve that can rapidly plug or unplug an opening, often driven by a spring for rapid repetition; poppet valve. [1/2 definitions]
relief valve a valve that opens automatically to relieve pressure, as in a boiler; safety valve.
safety valve a valve that opens automatically to reduce the pressure of confined gas or steam when a dangerously high level is reached. [1/2 definitions]
seacock a valve in the hull of a ship that controls the flow of outside water into the hull.
shut-off a device, such as a valve, that shuts something off. [1/2 definitions]
siphon bottle a sealed bottle having a tube through the neck that is connected at the top with a valve that controls the flow of the pressurized carbonated water in the bottle.
stopcock a valve regulating the flow of fluid through a pipe; faucet.
tappet in an engine or machine, a connecting rod moved by a cam so as to cause movement in another part such as a valve.
throttle a valve in a machine, esp. an automobile engine, that controls the flow of fuel, air, or the like. [2/5 definitions]
tricuspid of or pertaining to a three-part valve in the heart, located between the right auricle and the right ventricle. [1/3 definitions]
univalve having only one valve. [1/3 definitions]