sunblock
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sun·block

noun \-ˌbläk\

Definition of SUNBLOCK

: a preparation (as a lotion) applied to the skin to prevent sunburn (as by physically blocking out ultraviolet radiation); also : its active ingredient (as titanium dioxide) — compare sunscreen

First Known Use of SUNBLOCK

1972

sun·block

noun \ˈsən-ˌbläk\   (Medical Dictionary)

Medical Definition of SUNBLOCK

: a preparation (as a lotion) applied to the skin to prevent sunburn (as by physically blocking out ultraviolet radiation); also : its active ingredient (as titanium dioxide)—compare sunscreen

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