a system of naming the notes of a scale by syllables instead of letters derived from the 11th-century hexachord system of Guido d'Arezzo, which assigns the names ut (or do), re, mi, fa, sol, la, si (or ti) to the degrees of the major scale of C (fixed system) or (excluding the syllables ut and si) to the major scale in any key (movable system)
See also tonic sol-fa
Word origin
C18: from French solmisation, from solmiser to use the sol-fa syllables, from sol1 + mi
solmization in American English
(ˌsɑlmɪˈzeɪʃən)
noun
the system or practice of identifying musical tones by syllables: often used as an aid in teaching music
Word origin
Fr solmisation < solmiser, to sol-fa < sol + mi: see gamut