n. a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
n. a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
n. a double sulphate of aluminum and potassium that is used as an astringent (among other things)
n. 明矾, 矾, 校友
[化] 明矾; 钾铝明矾