si
n. (இசை.) இசைக்கேள்வியின் ஏழாவது சுரம்.
Si. Etym: [It.] (Mus.) Defn: A syllable applied, in solmization, to the note B; more recently, to the seventh tone of any major diatonic scale. It was added to Guido's scale by Le Maire about the end of the 17th century.