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
Indulge Your Inner Word Nerd
1978
First Known Use of sun protection factor
1978
Medical Dictionary
Seen and Heard
What made you want to look up sun protection factor? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!