Octateuch noun. 
['ɒktǝtju:k] Also 
Octoteuch. 
L17.[Late Latin octateuchus, from Greek oktateukhos containing eight books, formed as OCTA-, OCTO- + teukhos book.]The first eight books of the Old Testament and Hebrew Scriptures collectively; the Pentateuch together with the books of Joshua, Judges, and Ruth. Also, a manuscript or edition of the Octateuch. 
 [TahlilGaran] English Dictionary ▲