حك

مِحَكٌّ مح محك [ A touchstone; the stone upon which pieces of money &c. are rubbed to try their quality; ] the stone of the نَقَّادُون. (Har p. 66.) [It is commonly called in the present day مِحَكَّةٌ: which also signifies a stone for rubbing the soles of the feet, &c.: and a rasp. ]