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The Collaborative International Dictionary
Irritability

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.

Douglas Harper's Etymology Dictionary
irritability

1755, from irritable + -ity.

Wiktionary
irritability

n. 1 The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper. 2 (context physiology English) 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 (context medicine English) A condition of morbid excitability of an organ or part of the body; undue susceptibility to the influence of stimuli.

WordNet
irritability
  1. n. 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]

Wikipedia
Irritability

Irritability is an excitation response to stimuli. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessive sensitivity to stimuli. It is usually used to refer to anger or frustration. Irritability can be a growing response to the objective stimuli of hunger or thirst in animals or humans which then reaches some level of awareness of that need.

Irritability may be demonstrated in behavioral responses to both physiological and behavioral stimuli including environmental, situational, sociological, and emotional stimuli.

Usage examples of "irritability".

It is characterized by great irritability of the stomach, and persistent vomiting and purging, the discharges from the bowels being copious and watery, and sometimes containing specks of curd, yellowish-green matter, and mucus.

I cannot help feeling that it would have been better if the majority of Leaguers had done some bit of constructive work towards a Distributist world and sweated out of their system the irritability that found vent in some of their quarrels.

In some concluding remarks in the fifteenth chapter on the Droseraceae, the different kinds of irritability possessed by the several genera, and the different manner in which they capture insects, will be compared.

I must, however, admit that when Bonaparte spoke to Rapp and Duroc of the emigrants on the other side of the Rhine he expressed himself with much irritability: so much so, indeed, that M.

GENERAL NEURASTHENIA, or nervous exhaustion, may also produce a local weakness of the sexual centres of the brain and spinal cord, with symptoms at least resembling those of partial impotency and great irritability of the sexual organs, or a complete impotence, with premature seminal discharge whenever coition is attempted.

When varicocele of an aggravated or largely developed type is present, associated with any weakness of the generative organs, as spermatorrhea or impotency, it must be cured before the organs can regain a healthy condition, as by the constant pressure of the abnormal quantity of blood and enlarged veins upon the spermatic cord, arteries, and testicles, the irritability, weakness, and wasting, are increased.

But the former thoughtless, naive, and simplehearted energy, so familiar to him, had given place in her to sullen irritability, disappointment, cynicism, as it were, to which she was not yet accustomed and which was a burden to her.

During all this trying operation Dick Varley never once betrayed the slightest feeling of irritability or impatience.

To ascertain whether the valves were endowed with irritability, the surfaces of several were scratched with a needle or brushed with a fine camelhair brush, so as to imitate the crawling movement of small crustaceans, but the valve did not open.

Traces of that irritability lingered on his face even as he dozed, propped up by many pillows in his canopied bed.

It is often the case, it is true, that such frowardness and irritability may be the result of bad management, but still there are cases where it is impossible to doubt that they have their origin in the inner constitution of the body or of the mind.

Its other deficiency symptoms include irritability, joint pains, small and large haemorrhages, bleeding of the gums, and sore mouth.

Certain physical conditions, such as low blood sugar or hyperthyroidism, can cause symptoms that seem to be psychological, such as fears, nervousness, irritability, depression, etc.

It used to be thought that large doses of indol might be consumed with little or no effect on normal man, but now we know that headache, insomnia, confusion, irritability, decreased activity of the cells, and intoxication are possible from it.

Thus far, Lincoln chose not to notice the irritabilities of his commanders.