白矾 báifán alum Origin Definitions Defs Strokes Stroke Words Sentences Sents 白 bái adjective white white; snowy; pure; bright; (literary) white; bright矾 礬 fán alum Any of a group of hydrated double sulfate salts of certain metals, such as 明矾 míngfán, which are used in leather tanning, papermaking, and dyeing