n. 易怒, 刺激物, 兴奋性

[医] 应激性, 兴奋性, 刺激感受性, 兴奋增盛, 过敏

Irritability \Ir`ri*ta*bil"i*ty\, n. [L. irritabilitas: cf. F.
irritabilit['e].]
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.