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Pronunciation varies by accent · 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.
Use heliochromism when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Heliochromism means (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.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use heliochromism where its definition matches the intended context.
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