Hunab Ku () is a colonial period Yucatec Maya "reducido" term meaning "The One God". It is used in colonial, and more particularly in doctrinal texts, to refer to the Christian God. Since the word is found frequently in the Chilam Balam of Chumayel, a syncretistic document heavily influenced by Christianity, it refers specifically to the Christian god as a translation into Maya of the Christian concept of one God, used to enculturate the previously polytheist Maya to the new religion.