Definitions for "tribology"
Keywords:  friction, lubrication, din, wear, rub
the study of the effects of friction on parts of machinery moving in contact with each other, and of methods, such as lubrication, to counteract negative effects such as wear.
The study of the reciprocal effect of surfaces in relative motion (DIN 50323 Part 1), includes friction, wear and lubrication.
Science and technology of interacting surfaces in relation to relative motion.