(redirected from idiosyncratic)
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to idiosyncratic: Idiosyncratic Risk, Idiosyncratic reaction


Med an abnormal reaction of an individual to specific foods, drugs, or other agents



a painful reaction that appears in certain persons to irritants that do not produce similar phenomena in the majority of others. The basis of idiosyncrasy is either a congenital increased sensitivity of the autonomic nervous system to particular irritants or a reaction that arises in the body as a result of the repeated weak action of certain substances that are incapable of stimulating antibody production in the body.

Idiosyncrasy differs from allergy in that it may develop even after the first contact with an intolerable irritant—for instance, simple chemical compounds that do not have the properties of allergens; such food products as fish, roe, crab, milk, eggs, and strawberries; such medications as amidopyrine, antibiotics, and sulfanilamide preparations; the pollens of certain flowers and plants; the odor of various animals; insect poisons; and such physical factors as sunstroke, chill, or trauma.

Soon after contact with the irritant, headache appears in the individual, and his temperature rises, sometimes accompanied by mental agitation, disruption of the function of the organs of digestion (nausea, vomiting, diarrhea) and respiration (dyspnea, coryza), edema of the skin and mucosa, and urticaria. These phenomena, which are caused by disruptions of blood circulation, increased permeability of the vessels, and spasms of the smooth musculature, usually pass quickly, but sometimes may continue for several days. The reaction does not produce insen-sitivity to the repeated action of the agent. Treatment requires avoidance of further contact with the intolerable irritant and lowering the body’s heightened reactivity.



A peculiarity of constitution that makes an individual react differently from most persons to drugs, diet, treatment, or other situations.
Any special or peculiar characteristic or temperament by which a person differs from other persons.
References in periodicals archive ?
compare our results to those of Boutin-Dufresne and Savaria (12) who have conducted a similar analysis and so refine the idiosyncratic risk information available relative to the CSR dimension,
compare our sample of CSR rated organisations with a sample drawn from the New Economy sector as a validity benchmark; one expects the idiosyncratic risk of these organisations to be higher than that of CSR rated organisations,
Using the method developed by BKLS, which is based on the across-analyst correlation in forecast errors, we develop separate empirical proxies for the precisions of individual analysts' common information and idiosyncratic information, both before and after prior annual and quarterly earnings announcements.
Later forecasts reflect both more common and more idiosyncratic information.
Whether creation of such an ad hoc idiosyncratic specialty is likely to be acceptable to others or even possible at all clearly depends on the intellectual environment.
Even if social controls permit creation of such new idiosyncratic specialties, work in any particular new specialty may be rejected by others as a caricature or desecration, as involving distortions or misunderstandings of assimilated specialized work, and so on (compare Klein, 1990, p.
1) We argue that the investors' affinity for high idiosyncratic volatility stocks within the loss domain would lead to greater overpricing among these stocks.
Based on the foregoing discussion, we hypothesize that the negative relationship between idiosyncratic volatility and subsequent stock returns is concentrated in stocks with unrealized capital losses.
We document a positive and significant relation between aggregate effective bid-ask spreads and future excess stock market returns only when including aggregate idiosyncratic variance as a control.
above-market returns, she has idiosyncratic vision.
To our knowledge, this is the first study to examine advertising's effects on a firm's [beta]-risk and idiosyncratic risk by using quantile regression.
2) We assume that idiosyncratic labor income risk is correlated with asset return risk in our model.