a member of a group of puritanical Muslims, originally Berbers, who arose in S Morocco in the 12th century as a reaction against the corrupt Almoravides and who ruled Spain and all Maghrib from about 1147 to after 1213
12c. Muslim religious power that ruled Spain and North Africa, founded by Mohammed ibn Abdullah, the name is lit. "the Unitarians," short for Arabic al-muwahhidun "they who profess the unity (of God)," so called for their absolutist monotheism.