Eoarchean
plural of cologarithm
(botany) Any of the subshrubs and perennial herbs of the genus Shortia.
(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.
(UK, informal) All over the place
初期太古代に属するジルコンは地球最初期の大陸地殻に関する重要な証拠を示す。
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