硝酸钙 xiāosuāngài calcium nitrate Definitions Defs Origin Strokes Stroke Words Sentences Sents 硝酸 xiāosuān noun nitric acid A colorless or pale yellow corrosive strong acid with a sharp smell; widely used in manufacturing fertilizers, explosives, and chemicals.钙 鈣 gài noun calcium calcium; silvery-white chemical element with symbol Ca