Look up berceuse in Wiktionary, the free dictionary.
A berceuse[bɛʁsøz] is "a musical composition usually in 6 8time that resembles a lullaby".[1] Otherwise it is typically in triple meter. Tonally most berceuses are simple, often merely alternating tonic and dominant harmonies; since the intended effect is to put a baby to sleep, wild chromaticism would be somewhat inappropriate. Another characteristic of the berceuse, for no reason other than convention, is a tendency to stay on the "flat side"; noted examples including the berceuses by Chopin, who pioneered the form,[2]Liszt, and Balakirev, which are all in D♭.
Music
Berceuse pour deux notes qui cornent (for two notes which continue), for organ, JA 7, by Jehan Alain
"Berceuse" section of Dolly Suite for Piano four-hands, Op. 56, No. 1, by Fauré. Sometimes transcribed for violin and piano: not to be confused with the Op. 16 work, above.
Berceuse for an Unwanted Child (Reginald Foresythe) 1934