(redirected from heliosis)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.


see heatstrokeheatstroke,
profound disturbance of the heat-regulating mechanism of the body, also known as sunstroke. It is characterized by extremely high body temperatures and sometimes by convulsions and coma.
..... Click the link for more information.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an acute pathological state of humans and animals caused by a disturbance of brain functions as a result of the direct action of the sun’s rays on the head. In humans, structural and functional changes occur in the subcortical and truncal parts of the brain, which regulate respiration, blood circulation, temperature balance, and the level of wake fulness and sleep. The changes are manifested by headache, vomiting, lethargy, an increase in body temperature (sometimes higher than 40°C), convulsions, agitation, and disturbances of the pulse and respiration. In severe cases coma develops. First aid includes moving the sunstroke victim to shade and cooling him with cold compresses and wet packs. In severe cases artificial respiration is administered.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Heat stroke resulting from prolonged exposure to the sun, characterized by extreme pyrexia, prostration, convulsion, and coma. Also known as thermic fever.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


heatstroke caused by prolonged exposure to intensely hot sunlight
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005