Dictionary
sub•tract
Pronunciation: (sub-trakt'), [key]—
v.t.
1. to withdraw or take away, as a part from a whole.
2. Math.to take (one number or quantity) from another; deduct.
—
v.i.
to take away something or a part, as from a whole.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.