The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched; -- measured among minerals on a scale of which diamond and talc form the extremes.
The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
1) The relative resistance of a mineral to scratching, as measured by the Mohs' scale. 2) The relative resistance of a metal to denting, scratching or bending.