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sun protection factor

 
Dictionary: sun protection factor
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n. (Abbr. SPF)
The degree to which a sunscreen, suntan lotion, or similar preparation protects the skin from ultraviolet rays, usually expressed numerically.


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Food and Fitness: sun-protection factor
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Home > Library > Food & Cooking > Food and Fitness

SPF

An indicator on a sunscreen product of the relative degree of protection it provides against sunburn, compared to using no sunscreen. A product with an SPF of 15, for example, allows a person to be exposed to the sun, on average, fifteen times longer than if no sunscreen were applied.

Medical Dictionary: sun protection factor
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Home > Library > Health > Medical Dictionary

n. (Abbr. SPF)

The ratio of the minimal ultraviolet dose required to produce erythema with and without a sunscreen; a measure of the degree to which a sunscreen protects the skin from ultraviolet radiation, the higher the number the greater degree of protection.

Veterinary Dictionary: SPF
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Specific pathogen free.

 
 

 

Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.  Read more
Food and Fitness. Food and Fitness: A Dictionary of Diet and Exercise. Copyright © 1997, 2003 by Oxford University Press. All rights reserved.  Read more
Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.  Read more
Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.  Read more