| solar elastosis | Elastosis seen histologically in the sun-exposed skin of the elderly or in those who have chronic actinic damage. (05 Mar 2000) |
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| solar energy | Energy transmitted from the sun in the form of electromagnetic radiation. (12 Dec 1998) |
| solar fever | A tropical disease caused by dengue virus (Arbovirus), that is transmitted by the bite of an infected mosquito of the genus Aedes). Four severity grades of the illness are seen: grade I (fever and constitutional symptoms), grade II (grade I plus spontaneous bleeding of skin, gums or gastrointestinal tract), grade III (grade II plus agitation and circulatory failure) and grade IV (profound shock). Grade I infection is seen most frequently in world travelers, where it is usually self-limited and rarely fatal. The other grades are referred to as dengue haemorrhagic fever and are often fatal. Dengue haemorrhagic fever appears to be an infection by one of the other dengue viruses. Prior immunity to a different dengue virus type appears to be important in the development of the more serious haemorrhagic form. Vaccines are available. Protection from mosquitoes is an important preventive measure. (27 Sep 1997) |
| solar ganglia | The largest and highest group of prevertebral sympathetic ganglia, located on the superior part of the abdominal aorta, on either side of the origin of the coeliac artery; contains sympathetic neurons whose unmyelinated postganglionic axons innervate the stomach, liver, gallbladder, spleen, kidney, small intestine, and ascending and transverse colon. H Synonym: ganglia coeliaca, semilunar ganglion, solar ganglia, Vieussens' ganglia, Willis' centrum nervosum. (05 Mar 2000) |
| solar keratosis | A skin lesion that is abnormally sensitive to the effects of ultraviolet light (sunlight). Thought to be a precancerous skin lesion that is more common in the fair-skinned or elderly individual. Approximately 20% of these skin lesions will develop into squamous cell carcinoma. Prevention includes the use of sun screen agents and the avoidance of drugs (for example tetracyclines) known to cause photosensitivity reactions. Usually a discreet slightly raised, red or pink lesion located on a sun exposed surface. Texture may appear as rough, gritty or scaly. Growths may be biopsied to look for cancer or removed via cryotherapy or electrical cautery. Some topical agents may be used to promote peeling. (27 Sep 1997) |
| solar lentigo | Synonym: senile lentigo. (05 Mar 2000) |
| solar maculopathy | Damage to the fovea centralis of the retina and the adjacent choroid due to the thermal action of infrared rays, consequent to sungazing or watching a solar eclipse without sufficient eye protection. See: photoretinopathy. Synonym: eclipse blindness, solar blindness. (05 Mar 2000) |
| solar plexus | coeliac (nervous) plexus |
| solar retinopathy | A macular burn from excessive exposure to sunlight or other intense light (e.g., the flash of a short circuit); characterised subjectively by reduced visual acuity. See: solar maculopathy. Synonym: electric retinopathy, solar retinopathy. Origin: photo-+ retina, + G. Pathos, suffering (05 Mar 2000) |
| solar system | The group of celestial bodies, including the earth, orbiting around and gravitationally bound by the sun. It includes nine planets, 34 natural satellites, more than 1,000 observed comets, and thousands of lesser bodies known as minor planets (asteroids) and meteoroids. (12 Dec 1998) |
| solar therapy | Treatment of disease by exposure to sunlight. (05 Mar 2000) |
| solar urticaria | A form of urticaria resulting from exposure to specific light spectra; e.g., sunlight; some patients have passive-transfer antibodies and others do not. (05 Mar 2000) |