- (in a coelenterate) a filament at the mouth of a nematocyst which triggers the emission of the stinging hair when touched.；a bristle on the leaf of a Venus flytrap which triggers the closure of the leaf around an insect.
noun: trigger hair, plural noun: trigger hairs
- IPA[ˈtriɡər he(ə)r]
- (in a coelenterate) a filament at the mouth of a nematocyst, triggering the emission of the ...
Oxford American Dictionary