致突變原 zhìtūbiànyuán mutagen Origin Definitions Defs Strokes Stroke Words Sentences Sents 致 zhì verb to cause To lead to, result in, or incur a specific outcome or condition.突变 突變 tūbiàn noun mutation (biology) a change in the quantity or structure of the genetic material of an organism原 yuán noun origin (bound form) origin; source; beginning