Magnificat (n.) Look up Magnificat at Dictionary.com
c. 1200, from Latin third person singular of magnificare, from magnus "great" (from PIE root *meg- "great") + combining form of facere "to make, to do" (from PIE root *dhe- "to set, put"). So called from the first words of the Virgin's hymn (Luke i.46, in Vulgate Magnificat anima mea dominum "My soul doth magnify the Lord") used as a canticle.