spf
紫外线防护,紫外线杀菌剂,紫外线防护罩,紫外线防护剂
Definitions
- 1
- : sun protection factor: the effectiveness of a sunscreen in protecting the skin from the sun's ultraviolet UVB radiation, as rated on a scale of increasing protectiveness, the number being the ratio of the radiation dose needed to produce minimal redness when using sunscreen compared to the dose needed to produce the same redness without sunscreen:An SPF of 15 will allow you to stay in the sun 15 times longer.
Examples
SPF is in our moisturizers, lip balms, eye creams, and make-up.
You can buy a cellphone the way you choose SPF-labeled sunscreen: by SAR, or specific absorption rate.
Level 9Browse all words →