The Collaborative International Dictionary of English v.0.48:
Deduct \De*duct"\, v. t. [imp. & p. p. Deducted; p. pr. & vb.
n. Deducting.] [L. deductus, p. p. of deducere to deduct.
1. To lead forth or out. [Obs.]
A people deducted out of the city of Philippos.
2. To take away, separate, or remove, in numbering,
estimating, or calculating; to subtract; -- often with
from or out of.
Deduct what is but vanity, or dress. --Pope.
Two and a half per cent should be deducted out of
the pay of the foreign troops. --Bp. Burnet.
We deduct from the computation of our years that
part of our time which is spent in . . . infancy.
3. To reduce; to diminish. [Obs.] "Do not deduct it to days."