magnesia
/mæɡˈniʒə/
noun
- A white, powdery substance (magnesium oxide) used in medicine as an antacid or laxative, and in industry.
- The doctor recommended a spoonful of milk of magnesia for her upset stomach.
- Magnesia is often added to cement to help it resist high temperatures.
- She mixed magnesia with water to create a soothing paste for the rash.