mega-annum

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of megayear: a period of 1 million years.
    — Holonyms: petasecond < giga-annum, gigayear < exasecond

词形变化

mega-annums plural mega-anna plural

词源

From mega- + annum.
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