Source : Webster's Revised Unabridged Dictionary (1913)

Originative \O*rig"i*na*tive\, a.
   Having power, or tending, to originate, or bring into
   existence; originating. --H. Bushnell. --
   {O*rig"i*na*tive*ly}, adv.

Source : WordNet®

originative
     adj 1: having the ability or power to create; "a creative
            imagination" [syn: {creative}] [ant: {uncreative}]
     2: having the power to bring into being [syn: {creative}]
     3: containing seeds of later development; "seminal ideas of one
        discipline can influence the growth of another" [syn: {germinal},
         {seminal}]