ber·​ceuse | \ ber-ˈsœz  , -ˈsüz  \
plural berceuses\ ber-​ˈsœz  ; -​ˈsüz , -​ˈsü-​zəz \

Definition of berceuse

1: a musical composition usually in ⁶/₈ time that resembles a lullaby
2: lullaby