| 单词 | sun protection factor |
| 释义 | sun protection factornounSPF. Origin of sun protection factorFirst recorded in 1975–80 Words nearby sun protection factorsun parlor, sun pillar, sun porch, Sun Prairie, sunproof, sun protection factor, sunray, sunray pleats, sunrise, sunrise industry, sunrise service Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Medical definitions for sun protection factorsun protection factor n.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. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for sun protection factorsun protection factor A measure, expressed numerically, of the degree to which a preparation containing sunscreen protects the skin from ultraviolet rays. The higher the value, the greater the level of protection from sun damage to the skin. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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