gigayear
名词 n.
英文释义
名词 n.
-
A billion years: a thousand million years, that is, a thousand thousand thousand years.
— Holonyms: exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
词形变化
词源
Etymology tree
English giga-
Proto-Indo-European *(H)yeh₁-der.?
Proto-Indo-European *yóh₁r̥der.
Proto-Germanic *jērą
Proto-West Germanic *jār
Old English ġēar
Middle English yeer
English year
English gigayear
From giga- + year.
English giga-
Proto-Indo-European *(H)yeh₁-der.?
Proto-Indo-European *yóh₁r̥der.
Proto-Germanic *jērą
Proto-West Germanic *jār
Old English ġēar
Middle English yeer
English year
English gigayear
From giga- + year.
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数据来源: Wiktionary