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lightfast

 - 1 dictionary result

light⋅fast

[lahyt-fast, -fahst]
–adjective
not affected or faded by light, esp. sunlight; colorfast when exposed to light.

Origin:
1955–60; light 1 + fast 1


lightfastness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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