[bєә'sә:z]
n.
摇篮曲, 催眠曲

[ noun ]
a quiet song intended to lull a child to sleep
<noun.communication>

Berceuse \Ber`ceuse"\, n. [F.] (Mus.)
A vocal or instrumental composition of a soft tranquil
character, having a lulling effect; a cradle song.
[Webster 1913 Suppl.]