隐生宙隱生宙

yǐn shēng zhòu

Meaning

Cryptozoic; geological eon before the appearance of abundant fossils; hidden life, as opposed to Phanerozoic

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Characters

隐yǐnto hide, to conceal; secret, hidden阝急生shēnglife, lifetime; birth; growth一土宙zhòuspace, time, space-time宀由