生物大灭绝 shēngwùdàmièjué mass extinction Origin Definitions Defs Strokes Stroke Words Sentences Sents 生物 shēngwù noun living thing organism; living creature; life form; includes animals, plants, and microbes大灭绝 大滅絕 dàmièjué mass extinction The complete disappearance of a large number of species within a relatively short period of geological time