Dictionary
hair' trig"ger
a trigger that allows the firing mechanism of a firearm to be operated by very slight pressure.
hair-trig•ger
Pronunciation: (hâr'trig"ur), [key]—
adj.
easily activated or set off; reacting immediately to the slightest provocation or cause:
a hair-trigger temper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.