Also found in: Dictionary, Thesaurus, Medical, Financial, Idioms, Wikipedia.
Related to perspiration: insensible perspiration


see sweatsweat
or perspiration,
fluid secreted by the sweat glands of mammalian skin and containing water, salts, and waste products of body metabolism such as urea. The dissolved solid content of sweat is only one eighth that of an equal volume of urine, the body's main
..... Click the link for more information.



sweating, the formation of sweat and its excretion by the sweat glands onto the surface of the skin.

Perspiration is well manifested in man, higher and lower apes, and ungulates (mainly perissodactyls). In rodents, insectivores, bats, terrestrial predators, and lower mammals (duck-billed platypus and echidna) it is almost nonexistent. In man perspiration is continuous. It is performed principally by reflex action—reflex receptors are located in the skin, mucosa, and muscles. Adequate stimuli for the perspiration reflex are high air temperature, ingestion of hot or pungent food or large quantities of fluids, physical exertion, fever, and emotional states. Perspiration centers are located in the cerebral cortex, hypothalamus, medulla oblongta, and spinal cord. Perspiration may be increased or decreased by means of medicinal preparations. It depends on blood circulation in the skin: when the blood vessels are dilated it increases; when they are constricted it decreases. It is an adaptation of the body to temperatures over 33°C. Perspiration is involved in thermoregulation and in maintenance of the water and salt balances of the body. Perspiration is important as an excretory function, especially with diseases of the kidneys.

Perspiration disorders may be quantitative (general or local) or qualitative. Quantitative disorders are more frequent and are expressed as increase (hyperhidrosis), decrease (hypohidrosis), or absence (anhidrosis) of perspiration. General hyperhidrosis occurs with various infections, intoxications, functional disturbances of the endocrine glands (hyperthyroidism), and other diseases. Increased perspiration may also be produced by the severe emotional excitement of fear or pain, in which case on pale, cold skin a “cold sweat” appears. Local perspiration disorders arise with many skin diseases, such as eczema, psoriasis, and shingles. Hypohidroses and anhidroses are observed in the region of scars after burns and wounds, as well as in leprosy and certain vascular diseases. Disorders of perspiration arise most often when there is disease of various sections of the nervous system, such as expressed hyperhidrosis of the hands and feet, which occurs in neuroses.

Qualitative perspiration disorders are manifested by changes in composition and color of excreted sweat. Thus, the sweat may sometimes be fatty because of admixture with the secretions of the sebaceous glands in seborrhea. With diabetes mellitus it may contain increased sugar. With uremia, increased amounts of urea and uric acid are noted. Treatment is directed toward the basic disease. Local symptomatic agents are also used.


The secretion of sweat.


1. the act or process of insensibly eliminating fluid through the pores of the skin, which evaporates immediately
2. the sensible elimination of fluid through the pores of the skin, which is visible as droplets on the skin
3. the salty fluid secreted through the pores of the skin; sweat
References in periodicals archive ?
While this invention may have come about via an innovative solution to a trivial problem, it's no small issue for many Americans who suffer from hyperhidrosis, or abnormally high perspiration.
But maybe, just maybe, somewhere there's a small phial containing the perspiration that brought us Milk Wood.
Netherlands-based Lucy McCrae, the artist behind the unlikely idea, wrote on her site, "Swallowable Parfum is a digestible scented capsule that emits a unique odour through your own perspiration.
Marks & Spencer have a budget option Aloe Vera Roll On Anti-Perspirant, pounds 1, and Matis have Reponse Corps Roll-On Deodorant, pounds 11, which has been specially formulated to help reduce excess perspiration.
Perspiration remained, but the inspiration was gone and so too was Fletcher.
A leather lining allows your foot to breathe and prevents perspiration and odor," she says "Leather bottoms create a more natural form for a better walking experience.
That was one of the few times I was glad fat people get so sweaty--at least I could play off my tears of humiliation as perspiration running down my face.
Weather, caffeine, perspiration, and alcohol can zap the water right out of our bodies.
a maker of super-thin blown and cast TPU films, to develop medical films for wound dressings and breathable films to be applied to fabric to prevent perspiration odor.
A signal case in point is The Americans, US Gymnastics Team: Like several of White's subjects, the coach and the injured young female athlete he cradles Pieta-like in his arms both glisten with a sheen of vaguely postcoital perspiration, their expressions caught precisely on the cusp of pain and pleasure.
Diadora claims the technology quickly pulls perspiration and humidity away from the body while creating a barrier from harmful UV rays.