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Pronunciation varies by accent · noun
(mineralogy) A dark coloured mineral, consisting of manganese dioxide (MnO₂), that is an important ore of manganese..
Use pyrolusite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyrolusite means (mineralogy) A dark coloured mineral, consisting of manganese dioxide (MnO₂), that is an important ore of manganese..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pyrolusite where its definition matches the intended context.
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