Initiator
# Initiator

An initiator can refer to:

* A person who instigates something.
* Modulated neutron initiator, a neutron source used in some nuclear weapons
   * Initiator, an Explosive booster
   * Initiator, the first Nuclear chain reaction
* Pyrotechnic initiator, a device containing a pyrotechnic composition used primarily to ignite other, more difficult to ignite materials
* Radical initiator, chemical substances that can produce radical species under mild conditions
   * Photoinitiator, chemical substances that produce radical specials upon exposure to light
* SCSI initiator, the host-side endpoint of a SCSI session
* Monomeric polyols, such as glycerin, pentaerythritol, ethylene glycol and sucrose, serving as the starting point for polymeric polyols

## Biology

* Initiator element
* Initiator protein
* Initiation factor
