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The unit of length in f.p.s. units. It is equal to one-third of a yard and is now therefore defined as 0.3048 metre. Several units based on the foot were formerly used in science, including the units of work, the foot-pound-force and the foot-poundal, and the illumination units, the foot-candle and the foot-lambert. These have all been replaced by SI units.

Subjects: Physics.

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