noun (n)

• 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(noun.substance)

  Synonym:
  atomic number 14, silicon
  

  source: wordnet30
• 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)(noun.quantity)

  source: wordnet30
• the syllable naming the seventh (subtonic) note of any musical scale in solmization(noun.communication)

  Synonym:
  te, ti
  

  source: wordnet30