1) Biblical criticism 
The Hexateuch (`six scrolls`) is the first six books of the Hebrew Bible (the Torah or Pentateuch and the book of Joshua). The term Hexateuch came into scholarly use from the 1870s onwards mainly as the result of work carried out by Abraham Kuenen and Julius Wellhausen. Following the work of Eichhorn, de Wette, Graf, Kuenen, Noldeke, Colenso and.....
• (n.) The first six books of the Old Testament.
Hex'a·teuch` noun [ Hexa- + ... a tool, a book.] The first six books of the Old Testament.