milk of magnesia (n.)youdaoicibaDictYouDict[milk of magnesia 词源字典]
1880, proprietary name for white suspension of magnesium hydroxide in water, taken as an antacid, invented by U.S. chemist Charles Henry Phillips. Herbal or culinary preparations resembling milk had been similarly named (for example milk of almond) since early 15c.[milk of magnesia etymology, milk of magnesia origin, 英语词源]