meaning of efflorescence
1. Flowering, or state of flowering; the blooming of flowers; blowth.
2. A redness of the skin; eruption, as in rash, measles, smallpox, scarlatina, etc.
3. The formation of the whitish powder or crust on the surface of efflorescing bodies, as salts, etc.
4. The powder or crust thus formed.
5. a powdery deposit on a surface