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/paɪˈɹɒk.siːn/ · noun
(mineralogy) Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium..
By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within the chamber of liquid rock – or magma – beneath the volcano.
Use pyroxene when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyroxene means (mineralogy) Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within the chamber of liquid rock – or magma – beneath the volcano.
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