Dec·a·logue or Dec·a·log 
(dĕkə-lôg′, -lŏg′)
(dĕkə-lôg′, -lŏg′)n.
1. Bible The Ten Commandments.
2. A fundamental set of rules having authoritative weight.
[Middle English decalog, from Late Latin decalogus, from Greek dekalogos : deka, ten; see dek in the Appendix of Indo-European roots + logos, word, pronouncement; see leg- in the Appendix of Indo-European roots.]