Initiatory /(?)/

In·i·ti·a·to·ry

Initiatory

a.
  1. Suitable for an introduction or beginning; introductory; prefatory; as, an initiatory step.
  2. Tending or serving to initiate; introducing by instruction, or by the use and application of symbols or ceremonies; elementary; rudimentary.
    Some initiatory treatises in the law.
    Two initiatory rites of the same general import can not exist together.
    — J. M. Mason.

Initiatory

n.
  1. An introductory act or rite. [R.]