friction -
n. 1 the action of one object rubbing
against another.
2 the resistance an object encounters in moving over
another.
3 a clash of wills, temperaments, or opinions; mutual animosity arising from disagreement.
4 (in comb.) of devices that transmit motion by
frictional contact (
friction-clutch;
friction-disc).
friction-ball a ball used in bearings to lessen friction.
frictional adj. frictionless adj. [F f. L frictio -onis f. fricare frict- rub]