noun the powder or crust thus formed.
2. efflorescence ·noun flowering, or state of flowering; the blooming of flowers; blowth.
3. efflorescence ·noun a redness of the skin; eruption, as in rash, measles, smallpox, scarlatina, ·etc.
4. efflorescence ·noun the formation of the whitish powder or crust on the surface of efflorescing bodies, as salts, ·etc.