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Valid in these dictionaries

TWL/NWL (Scrabble US/CA/TH)
SOWPODS/CSW (Scrabble UK / ALL)
ENABLE (Words with Friends)

Meaning of si

1 definition found

From WordNet (r) 3.0 (2006) [wn]:

  Si
      n 1: 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 [syn: {silicon}, {Si}, {atomic
           number 14}]
      2: 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" [syn: {Systeme International
         d'Unites}, {Systeme International}, {SI system}, {SI}, {SI
         unit}, {International System of Units}, {International
         System}]
      3: the syllable naming the seventh (subtonic) note of any
         musical scale in solmization [syn: {ti}, {te}, {si}]

Source : WordNet ® Princeton University. 2010.

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OCTWL / TWL : The official dictionary for scrabble game in United States, Canada and Thailand.
SOWPODS / CSW : UK and the rest of the world uses this dictionary for various word games including scrabble.
ENABLE - This is the default dictionary for Words with Friends.

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