ir·ri·ta·bil·i·ty /ˌɪrətəˈbɪləti/
 易怒,過敏性,興奮性


 ir·ri·ta·bil·i·ty /ˌɪrətəˈbɪlətɪ/ 名詞
 感應性,應激性,興奮增盛,過敏


 Ir·ri·ta·bil·i·ty n.
 1. The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper.
 2. Physiol. 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, -- as that quality in plants by which they exhibit motion under suitable stimulation; esp., the property which living muscle possesses, of responding either to a direct stimulus of its substance, or to the stimulating influence of its nerve fibers, the response being indicated by a change of form, or contraction; contractility.
 3. Med. A condition of morbid excitability of an organ or part of the body; undue susceptibility to the influence of stimuli. See Irritation, n., 3.

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 irritability
      n 1: an irritable petulant feeling [syn: crossness, fretfulness,
            fussiness, peevishness, petulance, choler]
      2: excessive sensitivity of an organ or body part [syn: excitability]
      3: a disposition to exhibit uncontrolled anger; "his temper was
         well known to all his employees" [syn: temper, biliousness,
          peevishness, pettishness, snappishness, surliness]