Dictionary
si
Pronunciation: (sē), [key]—
n. Music.
the syllable used for the seventh tone of a scale and sometimes for the tone B.
Si
—
Symbol, Chem.
silicon.
S.I.
1. Sandwich Islands.
2. Staten Island.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.