Chinese edit

 
middle; centre; within
middle; centre; within; among; in; while (doing sth); during; China; Chinese; hit (the mark)
primeval past era
simp. and trad.
(中元古代)
元古
 
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Proper noun edit

中元古代

  1. (geology) the Mesoproterozoic era (part of the Proterozoic eon, spanning from 1.6 to 1 billion years ago)

See also edit