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Pronunciation varies by accent · noun
(mineralogy) A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat..
Use pyrophane when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyrophane means (mineralogy) A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pyrophane where its definition matches the intended context.
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