Definition of si

What does the word si mean? Find synonyms, antonyms and the meaning of the word si in our free online dictionary! Find words starting with si and anagrams of si.
Lookup si in the Scrabble Dictionary

si - 4 definitions

- noun
1. silicon -- a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
synonyms: silicon, Si, atomic number 14
Source:WordNet 3.0
 
2. Systeme International d'Unites -- a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the United States is the only country in the world not totally committed to the Systeme International d'Unites"
synonyms: Systeme International d'Unites, Systeme International, SI system, SI, SI unit, International System of Units, International System
Source:WordNet 3.0
 
3. ti -- the syllable naming the seventh (subtonic) note of any musical scale in solmization
synonyms: ti, te
Source:WordNet 3.0
 
4. si -- see ti
Source:OWL 2 Web Ontology Language
 
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