subtractive

• POS: Adjective
• HYPHEN: sub=trac=tive

CIDE DICTIONARY

subtractive, a. 

•  Tending, or having power, to subtract.  [1913 Webster]
•  Having the negative sign, or sign minus.  [1913 Webster]

ROGET THESAURUS

subtractive

Subtraction

N nonaddition, subtraction, subtraction, subduction, deduction, retrenchment, removal, withdrawal, ablation, sublation, abstraction, garbling mutilation, detruncation, amputation, abscission, excision, recision, curtailment, minuend, subtrahend, decrease, abrasion, subtracted, subtractive, in deduction, less, short of, minus, without, except, except for, excepting, with the exception of, barring, save, exclusive of, save and except, with a reservation, not counting, if one doesn't count.