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The Collaborative International Dictionary
Initiator

Initiator \In*i"ti*a`tor\, n. [L.] One who initiates.

Wiktionary
initiator

n. 1 One who initiates 2 (context chemistry English) A substance that initiates a chain reaction or polymerization 3 (context computing English) A task (in a mainframe computer) that initiates multiple jobs 4 (context medicine English) A material whose presence in the body eventually leads to cancer

WordNet
initiator

n. a person who initiates a course of action [syn: instigator]

Wikipedia
Initiator

An initiator can refer to:

  • A person that takes an initiative in making something happen.
  • 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

Usage examples of "initiator".

Marshall, the initiator of the command crisis, refused to acquiesce in the recall in which his own policy as much as loyalty to Stilwell was involved.

Perhaps Agent Haines, but I suspect that he is an instrument rather than initiator.

Doctrine had been proclaimed and established the need for Buddhas as initiators was replaced by another function.

We are the descendants of the initiators of Project Eurydice, the project from which there shall never be a looking-back situation.

The father is, then, the initiator, not only inducting the boy into his social role, but also, as representing to his daughter her first and foremost experience of the character of the male, awakening her to her social role as female to male.

He barked an order, and the barricade suddenly became an escort which fell in behind the officer and Lars, who had managed to keep at Killashandra's heels as the enraged crystal singer stormed forward to the Residence seeking the initiator of this additional affront.

Increasing speed in the vacuum, it crushed the nuclear mass uniformly to one third its original size, further increasing the density of the U-235, which was surrounded by a beryllium shell, and in turn crushing the nemo initiator, which was designed upon being crushed to create a huge influx of electrons, causing nuclear fusion and a supercritical mass.