sunscreen

or sun screen

[suhn-skreen]

noun

a substance formulated to prevent sunburn, skin cancers, and other conditions caused by excessive exposure to the sun, usually by absorbing and reflecting ultraviolet radiation.Compare SPF.
a lotion, cream, etc., containing such a substance.
a latticework or similar construction to shield a patio, atrium, or the like, from direct sunlight.

Origin of sunscreen

First recorded in 1730–40; sun + screen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for sunscreen

sunscreen

noun

a cream or lotion applied to exposed skin to protect it from the ultraviolet rays of the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sunscreen
n.

as a type of lotion applied to the skin, by 1954, from sun (n.) + screen (n.).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for sunscreen

sunscreen

[sŭnskrēn′]

n.

A preparation, often in the form of a cream or lotion, used to protect the skin from the ultraviolet rays of the sun.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.