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- Dictionaryirritability/ˌɪrɪtəˈbɪlɪti/
noun
- 1. the quality or state of being irritable: "symptoms include insomnia and irritability"
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noun
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Excitatory ability that living organisms have to respond to changes in their environment
Irritability is the excitatory ability that living organisms have to respond to changes in their environment. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessive sensitivity to stimuli. When reflecting human emotion and behavior, it is commonly defined as the tendency to react to stimuli with negative affective states (especially anger) a... Wikipedia