Obs. [f. C, sol, fa, names of musical notes: cf. Effaut.] The name of a musical note, the treble C, which was sol of the 6th hexachord and fa of the 7th. Cf. A RE.
a. 1325. Old Eng. Song, in Rel. Ant., I. 291. The song of the cesolfa. dos me syken sare.
