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POS
HYPHEN
CIDE DICTIONARY

periastron

 : 
Noun
 : 
per=i=as=tron

CIDE DICTIONARY

periastronn. [NL., fr. Gr. about + a star.].
     That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.  [1913 Webster]

For further exploring for "periastron" in Webster Dictionary Online


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