initiation

n. beginning, commencement; formal admission into some organization or position; ceremony celebrating admission into an organization or position; instruction, teaching of basic knowledge

Initiation is a rite of passage ceremony marking entrance or acceptance into a group or society. It could also be a formal admission to adulthood in a community or one of its formal components. In an extended sense it can also signify a transformation in which the initiate is 'reborn' into a new role. Examples of initiation ceremonies might include Christian baptism or confirmation, Jewish bar or bat mitzvah, acceptance into a fraternal organization, secret society or religious order, or graduation from school or recruit training.
See more at Wikipedia.org...

Initiation /ini·ti·a·tion/ the creation of a small alteration in the genetic coding of a cell by a low level of exposure to a carcinogen, priming [more]Initiation - Community and Resources

Noun
1. a formal entry into an organization or position or office; "his initiation into the club"; "he was ordered to report for induction into the army"; "he gave a speech as part of his installation into the hall of fame"
(synonym) induction, installation
(hypernym) ceremony, ceremonial, ceremonial occasion, observance
(hyponym) inauguration, inaugural
(derivation) initiate, induct
2. the act of starting something for the first time; introducing something new; "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"; "he regards the fork as a modern introduction"
(synonym) founding, foundation, institution, origination, creation, innovation, introduction, instauration
(hypernym) beginning, start, commencement
(hyponym) authorship, paternity
(derivation) originate, initiate, start
3. wisdom as evidenced by the possession of knowledge; "his knowledgeability impressed me"; "his dullness was due to lack of initiation"
(synonym) knowledgeability, knowledgeableness
(hypernym) wisdom, wiseness
4. an act that sets in motion some course of events
(synonym) trigger, induction
(hypernym) causing, causation
(hyponym) fomentation, instigation
(derivation) originate, initiate, start

n. initiation, introduction