EoarcheanWiktionary 原文英/ˌiːəʊ.ɑːˈkiːən/美/ˌiːoʊ.ɑrˈkiːən/释义形容词adjective1(geology) Of a geologic era within the Archaean eon from about 4600 to 3600 million years ago; the first single-celled life began at this time.专有名词proper noun1(geology) The era from 4,000 Ma to 3,600 Ma.