Context:
The Book of Deuteronomy (from Greek Δευτερονόμιον, Deuteronomion, "second law"; Hebrew: דְּבָרִים, Devarim, "[spoken] words") is the fifth book of the Hebrew Bible, and of the Jewish Torah/Pentateuch. The Hebrew title is taken from the opening phrase Eleh ha-devarim, "These are the words...";
the English title is a mistranslation of the Hebrew phrase mishneh ha-torah ha-zoth, "a copy of this law", in Deuteronomy 17:18, as to deuteronomion touto - "this second law".[1]
More:
http://en.wikipedia.org/wiki/Book_of_Deuteronomy