chorale (n.)

1828, "sacred choral song; musical composition in harmony, suited for performance by a choir," from German Choral "metrical hymn in Reformed church," shortened from Choralgesang "choral song," translating Medieval Latin cantus choralis, from Latin choralis "belonging to a chorus or choir," from chorus (see chorus). The -e was added to indicate stress. Meaning "group of singers performing choral music" is from 1942.