前洪积世 qiánhóngjīshì antediluvial Origin Definitions Defs Strokes Stroke Words Sentences Sents 前 qián prepositionlocative before (bound form) ago; before; earlier; previously洪积世 洪積世 hóngjīshì Pleistocene The Pleistocene epoch, also known as the Diluvial epoch, a geological time period equivalent to the 更新世 gēngxīnshì