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Pronunciation varies by accent · noun
(astronomy) In an orbit around the planet Mercury, the point that is closest to Mercury..
Use periherm when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Periherm means (astronomy) In an orbit around the planet Mercury, the point that is closest to Mercury..
The closest synonym depends on the sentence and intended sense.
Possible antonyms include apoherm.
Use periherm where its definition matches the intended context.
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