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Pronunciation varies by accent · noun
(astronomy, geology) an extraterrestrial particle less than a millimeter in size.
Use micrometeoroid when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Micrometeoroid means (astronomy, geology) an extraterrestrial particle less than a millimeter in size.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use micrometeoroid where its definition matches the intended context.
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