<OL TYPE="1"><LI>a touchstone, which is a black siliceous stone used to test the purity of gold or silver by the colour of the streak produced on it by rubbing it with either metal<LI>the rack or instrument of torture by which one is forced to divulge the truth<LI>torture, torment, acute pains<OL TYPE="a"><LI>of the pains of a disease<LI>of those in hell after death</OL></OL>