1) Materials science 
A tribometer is an instrument that measures tribological quantities, such as coefficient of friction, friction force, and wear volume, between two surfaces in contact. It was invented by the 18th century Dutch scientist Musschenbroek A tribotester is the general name given to a machine or device used to perform tests and simulations of wear, frict...
instrument measuring friction
• (n.) An instrument to ascertain the degree of friction in rubbing surfaces.
tribometer 1. An instrument for estimating sliding friction. 2. An instrument to ascertain the degree of friction in rubbing surfaces. Related 'rub, rubbing; wear away; wipe' word families: frica-, frict-; terg-; -tripsy; trit-.