二氧化锰 èryǎnghuàměng manganese dioxide Origin Definitions Defs Strokes Stroke Words Sentences Sents 二 èr numeral two the number two; 2氧化 yǎnghuà noun oxidize; oxidation to combine with oxygen; the chemical process of losing electrons (as in rusting or combustion)锰 錳 měng manganese (bound form) manganese; a chemical element with symbol Mn, used mainly in making steel and other alloys