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[L. fricare, to rub]
2. A massage technique in which one surface is rubbed over another, e.g., the skin over muscle. Both compressive and shearing forces are involved. Types of friction include warming, rolling, wringing, linear, stripping, cross-fiber, chucking, and circular. Most types of friction are performed with little or no lubricant.
3. Any force resisting motion that is generated when two surfaces move with respect to each other.