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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 ir·ri·ta·tion /ˌɪrəˈteʃən/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 ir·ri·ta·tion /ˌɪrəˈteʃən/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Ir·ri·ta·tion n.
 1. The act of irritating, or exciting, or the state of being irritated; excitement; stimulation, usually of an undue and uncomfortable kind; especially, excitement of anger or passion; provocation; annoyance; anger.
    The whole body of the arts and sciences composes one vast machinery for the irritation and development of the human intellect.   --De Quincey.
 2. Physiol. The act of exciting, or the condition of being excited to action, by stimulation; -- as, the condition of an organ of sense, when its nerve is affected by some external body; esp., the act of exciting muscle fibers to contraction, by artificial stimulation; as, the irritation of a motor nerve by electricity; also, the condition of a muscle and nerve, under such stimulation.
 3. Med. A condition of morbid excitability or oversensitiveness of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action.

From: WordNet (r) 2.0

      n 1: the psychological state of being irritated or annoyed [syn:
           annoyance, vexation, botheration]
      2: a sudden outburst of anger; "his temper sparked like damp
         firewood" [syn: pique, temper]
      3: (pathology) abnormal sensitivity to stimulation; "any food
         produced irritation of the stomach"
      4: the neural or electrical arousal of an organ or muscle or
         gland [syn: excitation, innervation]
      5: an uncomfortable feeling in some part of the body [syn: discomfort,
      6: unfriendly behavior that causes anger or resentment [syn: aggravation,
      7: the act of troubling or annoying someone [syn: annoyance,
         annoying, vexation]