A mineral substance, consisting of arsenic combined with about forty-three parts of sulphur, and is about thrice as heavy as water. It is found, both in a massive and crystallized state, in Turkey, Hungary, and some other countries. The orpiment of commerce is an artificial production, chiefly imported from different parts of the Levant. A beautiful, but fugitive pigment, called king's yellow, is prepared from this mineral. (See Painting.)