ir·ri·ta·bil·i·ty noun \ˌir-ət-ə-ˈbil-ət-ē\
: the property of protoplasm and of living organisms that permits them to react to stimuli
a : quick excitability to annoyance, impatience, or anger b : abnormal or excessive excitability of an organ or part of the body (as the stomach or bladder)
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