Ĕf'flo-rĕs'çençe or Ĕf'flo-rĕs'çen-çy, n.
n. [Fr. efflorescence, It. efflorescenza.]
Sense 1. (Bot.) The time of flowering; the season when a plant shows its first blossoms.
Sense 2. (Med.) A redness of the skin; eruption, as in rash, measles, small-pox, scarlatina, &c.
Sense 3. (Chem.) (a.) The formation of the whitish loose powder or crust on the surface of efflorescing bodies, as salts, &c. (b.) The powder or crust itself thus formed.