Webster's 1828 Dictionary
SUBSTRACT
v.t.[L. subtraho, subractum.] To subtract. Note. --Substract was formerly used in analogy with abstract. But in modern usage, it is written according to the Latin, subtract. See this word and its derivatives.
SUBSTRACTION
n.In 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.
Webster's 1913 Dictionary
SUBSTRACT
Sub *stract ", v. t. Etym: [F. suostraire; L. subtus below (from sub under ) + trahere to draw. See Substract. ]
Defn: To subtract; to withdraw. [Obs. ] Barrow.
SUBSTRACTION
Sub *strac "tion, n. Etym: [OF. substraction, F. soustraction. See Subtract. ]
1. Subtraction; deduction. [Obs. ]
2. (Law )
Defn: See Subtraction, 3.
SUBSTRACTOR
SUBSTRACTOR Sub *stract "or, n.
1. One who subtracts.
2. A detractor; a slanderer. [Obs. ] Shak.
Spanish Dictionary
substractivo, -va
substractivo, -va sustractivo .