毒莠定 dúyǒudìng picloram Origin Definitions Defs Strokes Stroke Words Sentences Sents 毒 dú noun poison poison; toxin; harmful substance莠 yǒu bristlegrass (bound form) green bristlegrass; weeds; often referred to as 狗尾草 gǒuwěicǎo定 dìng particleverb fixed (bound form) stable; settled; already agreed upon or established by rule