si

Noun

• the syllable naming the seventh (subtonic) note of any musical scale in solmization

• 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
    

• 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

Related words

• Synonyms: 
  ti , te , Systeme International d'Unites , Systeme International , SI system , SI , SI unit , International System of Units , International System , silicon , Si , atomic number 14