float(redirected from float boat)
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a device that has both floatability and buoyancy when immersed.
Floats may be of the support type (pontoons of seaplanes and floating bridges, the floats of fishing nets, and hook floats of fishing rods); the hydrometric type, for measurement of flow velocity or variations in level (such as tide gauges); or the actuating type, which operate shutoff valves and other devices depending on the level of a liquid (as in the float chamber of a carburetor and in water-supply systems and the like).
render, float, and set
ii. A buoyant structure or component fitted to an aircraft to enable it to be supported in water or to stabilize it in water. See float gear.
iii. A buoyant needle or capsule in a float-type carburetor that keeps the fuel level a constant distance below the edge of the discharge nozzle. See float-type carburetor.