Pentateuch \Pen"ta*teuch\, n. [L. pentateuchus, Gr. ?; ? (see {Penta-}) + ? a tool, implement, a book, akin to ? to prepare, make ready, and perh. to E. text. See {Five}, and {Text}.] The first five books of the Old Testament, collectively; -- called also the {Law of Moses}, {Book of the Law of Moses}, etc.