A credo is a statement of belief, commonly used for religious belief, such as the Apostles' Creed. The term especially refers to the use of the Nicene-Constantinopolitan Creed (or less often, the Apostles' Creed) in the Mass, either as text, Gregorian chant, or other musical settings of the mass.
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credo Any system of principles or beliefs.
credo The creed, as sung or read in the Roman Catholic church.
