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Webster's Dictionary (1865)

Sub-străc'tion, n.

noun

n. [O. Fr. substraction, Fr. sous-traction, Sp. substraction, It. sottrazione, suttrazione, L. Lat. subtractio.]

  1. Subtraction. [Obs.] See SUBTRACTION.
  2. (Law.) The withdrawing or withholding of some right.

☞ Thus the substraction of conjugal rights is when either the husband or wife withdraws from the other and lives separate. The substraction of a legacy is the withholding or detaining of it from the legatee by the executor. In like manner, the withholding of any service, rent, duty, or custom, is a substraction, for which the law gives a remedy. Blackstone.