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Pronunciation varies by accent · noun
(mineralogy) A blackish-green mineral that is a hydrous phosphate of iron..
Use dufrenite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Dufrenite means (mineralogy) A blackish-green mineral that is a hydrous phosphate of iron..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use dufrenite where its definition matches the intended context.
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