Dictionary

sun protection factor

noun

Definition of SUN PROTECTION FACTOR

:  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 —abbreviation SPF
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First Known Use of SUN PROTECTION FACTOR

1978
Medical Dictionary

sun protection factor

noun

Medical Definition of SUN PROTECTION FACTOR

:  spf

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