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Pronunciation varies by accent · noun
(mineralogy) A dark, glassy rock generated by frictional heat within faults.
Use pseudotachylite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pseudotachylite means (mineralogy) A dark, glassy rock generated by frictional heat within faults.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pseudotachylite where its definition matches the intended context.
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