Definitions
irritability Tweet Definition of irritability Like Definition of irritability on Facebook
noun 
  1. The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper.
  2. (physiology) A natural susceptibility, characteristic of all living organisms, tissues, and cells, to the influence of certain stimuli, response being manifested in a variety of ways.
  3. (medicine) A condition of morbid excitability of an organ or part of the body; undue susceptibility to the influence of stimuli.
Etymology: From irritabilitas


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