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Definition of Heliochromism
1. Noun. (physics chemistry) The property of certain photochromic materials of colouring in near-ultraviolet light and then fading in its absence; they are used in the lenses of sunglasses ¹
¹ Source: wiktionary.com
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1. Noun. (physics chemistry) The property of certain photochromic materials of colouring in near-ultraviolet light and then fading in its absence; they are used in the lenses of sunglasses ¹
¹ Source: wiktionary.com