|Noah Webster's Dictionary|
(n.) A syllable applied, in solemnization, 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.
Si (1 Occurrence)
Ezekiel 45:7 Whatever is for the prince shall be on the one side and on the other side of the holy offering and of the possession of the city, in front of the holy offering and in front of the possession of the city, on the west side westward, and on the east side eastward; and in length answerable to one of the portions, from the west border to the east border. (Root in WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)