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Pronunciation varies by accent · noun
The dating of sedimentary units by calibration with astronomically tuned time scales..
Use astrochronology when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Astrochronology means The dating of sedimentary units by calibration with astronomically tuned time scales..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use astrochronology where its definition matches the intended context.
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