initiatory
1. [ adjective ] serving to set in motion
Synonyms: first inaugural maiden initiative
Examples:

"the magazine's inaugural issue" "the initiative phase in the negotiations" "an initiatory step toward a treaty" "his first (or maiden) speech in Congress" "the liner's maiden voyage"

Related terms: opening
Similar spelling:   initiator
  initiate
  intuition
  initiated
  initiative
  initiation
  in_toto
  in_that
  intuitionist
  intuitionism
  intuitively
  intuitive