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cu·mu·la·tive 'kyü-myə-lət-iv, -.lāt- adj increasing in effect by successive doses (as of a drug or poison) <\cumulative poisoning by organochlorine pesticides (Jack Clincy)>
cu·mu·la·tive·ly adv
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cu·mu·la·tive (kuґmu-lə-tiv) [L. cumulus heap] increasing by successive additions, the total being greater than the expected sum of its parts.Medical dictionary. 2011.