giga-annum

名词 n.

英文释义

名词 n.
  1. Synonym of gigayear: a billion years.
    — Geophysicists today estimate the earth’s age to be 4.5–4.6 Ga (giga-annums = 1 x 10⁹ years) based on data from lead isotopes (Dalrymple 403).

词形变化

giga-annums plural

词源

From giga- + annum.
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