That triggers or initiates.

Any of several brightly coloured fish, of the family Balistidae, that inhabit tropical reefs and have an erectile spine on the dorsal fin.

plural of triggerfish

A trigger that will set off a firearm when even a very small pressure is applied.

Unstable; in a situation that could be worsened by the slightest mistake. / Easily angered; having a short temper.

simple past tense and past participle of trigger

Having a trigger that reacts to some specific condition. / (Internet slang) angered; agitated

plural of trigger

Third-person singular simple present indicative form of trigger

Rhinecanthus rectangulus, a species of triggerfish.