The Collaborative International Dictionary of English v.0.48:

Generative \Gen"er*a*tive\, a. [Cf. F. g['e]n['e]ratif.]
   Having the power of generating, propagating, originating, or
   producing. "That generative particle." --Bentley.
   [1913 Webster]

WordNet (r) 3.0 (2006):

generative
    adj 1: having the ability to produce or originate; "generative
           power"; "generative forces" [syn: generative,
           productive] [ant: consumptive]
    2: producing new life or offspring; "the reproductive potential
       of a species is its relative capacity to reproduce itself
       under optimal conditions"; "the reproductive or generative
       organs" [syn: generative, procreative, reproductive]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "generative":
   abiogenetic, aboriginal, basal, basic, biogenetic, blastogenetic,
   causative, central, constructive, creative, crucial, demiurgic,
   elemental, elementary, embryonic, epigenetic, eumerogenetic,
   formative, fundamental, gametic, genetic, genial, genital,
   genitive, germinal, heterogenetic, histogenetic, homogenetic,
   in embryo, in ovo, inventive, isogenetic, merogenetic, metagenetic,
   monogenetic, original, originative, orthogenetic, pangenetic,
   parthenogenetic, phytogenetic, pregnant, primal, primary, primeval,
   primitive, primordial, pristine, productive, protogenic, radical,
   rudimentary, seminal, sporogenous, xenogenetic