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Pronunciation varies by accent · noun
(mineralogy) An orthorhombic-pyramidal mineral containing barium, hydrogen, oxygen, and uranium..
Use billietite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Billietite means (mineralogy) An orthorhombic-pyramidal mineral containing barium, hydrogen, oxygen, and uranium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use billietite where its definition matches the intended context.
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