Plural of gradual; multiple liturgical chants sung during Catholic Mass, or multiple copies of graduale manuscripts.
From 'gradual' plus plural '-s', from Latin 'gradualis'. This term applies both to the music itself and to the manuscripts containing such music.
Medieval monks spent years copying graduals by hand—each ornate manuscript was a work of art that took months to create, so churches treasured them as both spiritual and economic assets!
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