15296687-n 'an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded';
 
汉语 历元
英语 epoch , date of reference
Italian epoca
日语 元期
Definitions
英语
an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
日语
情報（天体の座標などの）が記録される時間における任意の一定である日付
Relations
Hypernym: date
Domain–Category: astronomy
Semantic Field: timen
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