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Pronunciation varies by accent · noun
Any hard, black hydrous manganese oxide with variable amounts of barium and potassium..
Use psilomelane when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Psilomelane means Any hard, black hydrous manganese oxide with variable amounts of barium and potassium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use psilomelane where its definition matches the intended context.
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