Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Rock rich in silicon and aluminum forming the upper layer of the earth's crust beneath all continental landmasses.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The rocks rich in silicon and aluminum that form the upper layer of the earth's crust, which lies beneath all continental landmasses.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

si(licon) + al(uminum).

from Wiktionary, Creative Commons Attribution/Share-Alike License

Si (silicon) + Al (aluminium)

Examples

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