0 relating to subtraction (= the process of removing one number from another):
The subtractive equation property states that the two sides of an equation remain equal if the same number is subtracted from each side.
Milling machines carve parts in a subtractive process from a blank.
Medicine is subtractive in that you need to subtract out anything that is irrelevant until you can isolate the one thing left that works.
Interference is a phenomenon in which two waves either have an additive or subtractive effect on each other's intensity.
