水杨酸 shuǐyángsuān salicylic acid Origin Definitions Defs Strokes Stroke Words Sentences Sents 水杨 水楊 shuǐyáng water willow A type of deciduous willow tree or shrub in the willow family Salicaceae, with leaves that are dark green on top and grayish-white with fine hairs on the bottom.酸 suān noun acid acid, a chemical compound that releases hydrogen ions in water