Si Definition
 sē 
    noun
  
 Ti.
 American Heritage 
Webster's New World 
(music) A syllable used in solfège to represent the seventh note of a major scale.
 Wiktionary 
Synonyms: 
  - atomic number 14
 - silicon
 - international system
 - international-system-of-units
 - si unit
 - SI system
 - Systeme International
 - Systeme International d'Unites
 - te
 - ti
 
    abbreviation
  
 Sirach (Ecclesiasticus)
 Webster's New World 
International System of weights and measures, using the metric system augmented by scientific units used in technology.
 Webster's New World 
    symbol
  
 Silicon.
 Webster's New World 
    adverb
  
 Yes.
 Webster's New World 
Yes.
 Webster's New World 
Origin of Si
-  
Italian from Medieval Latin gamut
From American Heritage Dictionary of the English Language, 5th Edition
 





