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Webster's Dictionary (1865)

Sub-trăc'tion, n.

noun

n. [Lat. subtractio, It. sottrazione, sottrazione. See supra, and cf. SUBSTRACTION.]

  1. The act or operation of subtracting, deducting, or taking away a part.
  2. (Math.) The taking of a lesser number or quantity from a greater of the same kind or denomination; an operation by which is found the difference between two sums.
  3. (Law.) The same as SUBSTRACTION, q. v.