Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • abbreviation sun protection factor

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • initialism sun protection factor
  • initialism single point of failure
  • initialism Sender Policy Framework
  • initialism SPF spray polyurethane foam
  • initialism Spruce-pine-fir, mixed softwood timber

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the degree to which a sunscreen protects the skin from the direct rays of the sun

Etymologies

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