二甲基砷酸 èrjiǎjīshēnsuān dimethylarsinic acid Origin Definitions Defs Strokes Stroke Words Sentences Sents 二 èr numeral two the number two; 2甲基 jiǎjī methyl the methyl group in chemistry砷 shēn noun arsenic (bound form) arsenic; a poisonous chemical element with the symbol As酸 suān noun acid acid, a chemical compound that releases hydrogen ions in water