%gerah%

‖n. [ Heb. g&unr_;rah, lit., a bean. ] (Jewish Antiq.) A small coin and weight; 1-20th of a shekel. [ 1913 Webster ]

☞ The silver gerah is supposed to have been worth about three cents; the gold about fifty-four cents; the weight equivalent to about thirteen grains. [ 1913 Webster ]