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Pronunciation varies by accent · noun
(mineralogy) A monoclinic mineral containing niobium, oxygen, and sodium..
Use natroniobite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Natroniobite means (mineralogy) A monoclinic mineral containing niobium, oxygen, and sodium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use natroniobite where its definition matches the intended context.
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