Abbreviation for sun protection factor.
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skin protection factor; specific pathogen-free; spectrophotofluorometer; S-phase fraction; split products of fibrin; standard perfusion fluid; Stuart-Prower factor; sun protection factor; systemic pulmonary fistula
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SPF .es-(.)pē-'ef n 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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sun protection factor; specific-pathogen free, a term applied to animals reared for laboratory experiments and known to be free of specific pathogens.Medical dictionary. 2011.