from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The sign √ placed before a quantity, indicating extraction of the root designated by a raised integer. When extracting a square root, the raised integer is customarily omitted.
  • noun The radical sign together with a horizontal bar extending from its top to the end of the expression from which a root is to be extracted.

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

  • noun a sign indicating the extraction of a root


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