ORIGINATIVE
creative, originative
(adjective) having the ability or power to create; “a creative imagination”
germinal, originative, seminal
(adjective) containing seeds of later development; “seminal ideas of one discipline can influence the growth of another”
Source: WordNet® 3.1
Adjective
originative (comparative more originative, superlative most originative)
That originates; creative
Source: Wiktionary
O*rig"i*na*tive, a.
Definition: Having power, or tending, to originate, or bring into
existence; originating. H. Bushnell.
– O*rig"i*na*tive*ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition