Definition of SPF

sun protection factor

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“SPF.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/SPF. Accessed 27 Feb. 2021.

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SPF

noun
\ ˌes-(ˌ)pē-ˈef How to pronounce SPF (audio) \

Medical Definition of SPF

: a number assigned to a sunscreen that is the factor by which the time required for unprotected skin to become sunburned is increased when the sunscreen is used

called also sun protection factor

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