Definition of sial

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  • sial is a valid Scrabble US word with a point value of 4
  • sial is a valid Scrabble UK word with a point value of 4
  • sial is a valid Words with friends word with a point value of 5

Definition of sial

  • the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum (noun)

See definition of sial in Merriam Webster