FRIC'TION, n. [L. frictio, frico, to rub.] 1. The act of rubbing the surface of one body against that of another; attrition. Many bodies by friction emit light, and friction generates or evolves heat.2. In mechanics, the effect of rubbing, or the resistance which a moving body meets with from the surface on which it moves.3. In medicine, the rubbing of the body with the hand, or with a brush, flannel, &c.; or the rubbing of a diseased part with oil, unguent or other medicament.
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