| a milky white suspension in water of magnesium hydroxide, Mg (OH)2, used as an antacid or laxative. |

| milk of magnesia n. A milky white aqueous suspension of magnesium hydroxide, Mg(OH)2, used as an antacid and a laxative. |
milk of magnesia n.
A milky white aqueous suspension of magnesium hydroxide used as an antacid and a laxative.