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sun block
Variant of sunblock
noun
- a substance, as para-aminobenzoic acid, used in lotions, cosmetics, etc. to block certain ultraviolet rays of the sun and reduce the danger of sunburn; sunscreen
- a lotion, cosmetic, etc. containing this
Also written sun block
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.