Source : Webster's Revised Unabridged Dictionary (1913)

Subduce \Sub*duce"\, Subduct \Sub*duct"\, v. t. [L. subducere,
   subductum; sub under + ducere to lead, to draw. See {Duke},
   and cf. {Subdue}.]
   1. To withdraw; to take away. --Milton.

   2. To subtract by arithmetical operation; to deduct.

            If, out of that infinite multitude of antecedent
            generations, we should subduce ten.   --Sir M. Hale.