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Definition 2024


sun_protection_factor

sun protection factor

English

Noun

sun protection factor (plural sun protection factors) (abbreviated as SPF)

  1. An indication of how long a sunscreen remains effective when applied to the skin.
    If someone normally burns in 10 minutes with no sunscreen, then a sunscreen with sun protection factor 20 will provide protection for up to 20x10 = 200 minutes

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