Des'i·tive adjective Final; serving to complete; conclusive. [ Obsolete] ' Desitive propositions.' I. Watts. Found on http://www.encyclo.co.uk/webster/D/46
Des'i·tive noun (Logic) A proposition relating to or expressing an end or conclusion. [ Obsolete] I. Watts. Found on http://www.encyclo.co.uk/webster/D/46