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/ˈɹɛnɡeɪaɪt/ · noun
(mineralogy) A monoclinic-prismatic dark greenish brown mineral containing calcium, lanthanum, cerium, praseodymium, neodymium, samarium, oxygen, silicon, strontium, titanium, and zirconium..
Use rengeite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Rengeite means (mineralogy) A monoclinic-prismatic dark greenish brown mineral containing calcium, lanthanum, cerium, praseodymium, neodymium, samarium, oxygen, silicon, strontium, titanium, and zirconium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use rengeite where its definition matches the intended context.
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