I. Date: circa 1529 intransitive verb to sing the ~ syllables, transitive verb to sing (as a melody) to ~ syllables, II. noun Date: 1548 ~ syllables , solmization , tonic ~ , ~ist noun
SOL-FA
Meaning of SOL-FA in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012