What does "hepar" mean?

Hepar: Any substance resembling hepar proper, in appearance; specifically, in homeopathy, calcium sulphide, called also hepar sulphuris calcareum ( Hepar antimonii ( (Old Chem.), a substance, of a liver-brown color, obtained by fusing together antimony sulphide with alkaline sulphides, and consisting of sulphantimonites of the alkalies; -- called also liver of antimony.