CHORIN, AARON (1766-1844), Hungarian rabbi and pi oneer of religious reform, born at Weisskirchen, Moravia, on Aug. 3, 1766, educated at Prague, and became rabbi at Arad in 1789. His Emek ha Shaweh (Vale of the Plain) of 1803 was declared heretical by the orthodox party, but he continued to favour such reforms as modification of the traditional laws, vernacular prayers, and the use of the organ. Chorin was also interested in the promotion of schools, seminaries, and profes sions among the Jews. He died on July 26, See L. Low: Gesammelte Schriften vol. ii. (Szegedin, 1889).