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per•i•as•tron



Pronunciation: (per"ē-as'trun, -tron), [key]
n.,
pl. -traPronunciation: (-tru). [key]
Astron.
the point at which the stars of a binary system are closest (opposed to apastron).

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

periarteritis nodosaperiblem
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