[1] : The Collaborative International Dictionary of English v.0.48

accumulative \accu"mulative\, a.
   characterized by accumulation; serving to collect or amass;
   cumulative; additional. -- accu"mulatively, adv. --
   accu"mulativeness, n.
   1913 webster
see also:
accu"mulatively accu"mulativeness 

[2] : WordNet (r) 2.0

accumulative
     adj 1: increasing by successive addition; "the benefits are
            cumulative"; "the eventual accumulative effect of
            these substances" syn: cumulative
     2: marked by acquiring or amassing; "we live in an accumulative
        society"
see also:
cumulative 

Accumulative >> A Words
Accumulative, definition of term: Accumulative
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