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May 27, 2012
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per•i•he•li•on



Pronunciation: (per"u-hē'lē-un, -hēl'yun), [key]
—n.,
—pl. -he•li•aPronunciation: (-hē'lē-u, -hēl'yu). [key] Astron.
the point in the orbit of a planet or comet at which it is nearest to the sun. Cf. aphelion. See diag. under aphelion.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

perigynyperil
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