单词 | Archaean |
释义 | Archaean or (US) Archean /är-kēˈən/ (geology)adjectiveOf or belonging to the first eon of geological time, between approx 4500 and 2500 million years ago (also noun) ORIGIN: Gr archaios ancient, from archē beginning Archaea /är-kēˈə or ärˈ/plural nounA domain of living organisms containing prokaryotic micro-organisms ORIGIN: Gr archaios ancient, from archē beginning Archae'an adjective and noun |
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