cha·conne 
(shä-kôn, -kŏn)
(shä-kôn, -kŏn)n.
1.
a. A slow, stately dance in triple time of the 1700s.
b. The music for this dance.
2. A form consisting of variations based on a reiterated harmonic pattern.
[French, from Spanish chacona, a kind of dance in quick tempo, of unknown origin.]