SG Heritage Dictionary

Effloresce [Verb transitive] Webster's Dictionary 1828

1. efflores'. [Latin effloresco, from floresco, floreo, to blossom, flos, a flower. See Flower .

2. In chimistry, to form a mealy powder on the surface; to become pulverulent or dusty on the surface. Substances effloresce by losing their water of crystallization.

3. Those salts whose crystals effloresce belong to the class which is most soluble, and crystalize by cooling.

4. To form saline vegetation on the surface; or rather to shoot out minute spicular crystals; as the efflorescence of salts on plaster.

Effloresce [Verb intransitive] Webster's Dictionary 1913

1. To blossom forth.

2. To change on the surface, or throughout, to a whitish, mealy, or crystalline powder, from a gradual decomposition, esp. from the loss of water, on simple exposure to the air; as, Glauber's salts, and many others, effloresce.

3. To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action in consequence of nitric acid formed in the atmosphere.

Effloresced [Imperfect tense and past participle] Webster's Dictionary 1913

of Effloresce

Efflorescence [Noun] Webster's Dictionary 1828

1. In botany, the time of flowering; the season when a plant shows its first blossoms.

2. Among physicians, a redness of the skin; eruptions; as in rash, measles, small pox, scarlatina, etc.

3. In chimistry, the formation of small white threads, resembling the sublimated matter called flower, on the surface of certain bodies, as salts. This is properly a shooting out of minute spicular crystals, called sometimes a saline vegetation, as that of the sulphate of magnesia on the deserts of Siberia, and of natron in Egypt. In butter much salted, the salt shoots in spiculae, and an efflorescence is often seen on walls formed with plaster. In some species of salts, as in sulphate and carbonate of soda, the efflorescence consists of a fine white dust. This kind of efflorescence is the contrary of deliquescence. In the latter, the saline crystals decompose the air, or rather abstract moisture from it; in the former, the atmosphere decomposes the saline crystals, and the water of crystallization is abstracted from the salts.

Efflorescence [Noun] Webster's Dictionary 1913

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.

Efflorescency [Noun] Webster's Dictionary 1913

The state or quality of being efflorescent; efflorescence.

Efflorescent [Adjective] Webster's Dictionary 1828

Shooting into white threads or spiculae; forming a white dust on the surface.

Efflorescent [Verb intransitive] Webster's Dictionary 1913

1. That effloresces, or is liable to effloresce on exposure; as, an efflorescent salt.

2. Covered with an efflorescence.