This article needs additional citations for verification. (May 2010) (Learn how and when to remove this template message)
In chemistry, initiation is a chemical reaction that triggers one or more secondary reactions. Often the initiation reaction generates a reactive intermediate from a stable molecule which is then involved in secondary reactions. In polymerisation, initiation is followed by a chain reaction and termination.
- (en) Initiation Definitie volgens IUPAC Gold book.