resistance of a material, as a stone or metal, to scratching by one of several other materials, the known hardnesses of which are assembled into a standard scale, as the Mohs' scale of minerals.
[ 1925-30 ]
SCRATCH HARDNESS
Meaning of SCRATCH HARDNESS in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012