bloom vs efflorescence what difference

what is difference between bloom and efflorescence



  • IPA(key): /bluːm/
  • Homophone: Bloom
  • Rhymes: -uːm

Etymology 1

From Middle English blome, from Old Norse blóm, from Proto-Germanic *blōmô (flower). Doublet of bloom (“spongy mass of metal”); see there for more.


bloom (countable and uncountable, plural blooms)

  1. A blossom; the flower of a plant; an expanded bud.
    • 1843, William H. Prescott, The History of the Conquest of Mexico
      the rich blooms and enamelled vegetation of the tropics
  2. (collective) Flowers.
  3. (uncountable) The opening of flowers in general; the state of blossoming or of having the flowers open.
  4. (figuratively) A state or time of beauty, freshness, and vigor; an opening to higher perfection, analogous to that of buds into blossoms.
    • every successive mother had transmitted to her child a fainter bloom, a more delicate and briefer beauty.
  5. Rosy colour; the flush or glow on a person’s cheek.
  6. The delicate, powdery coating upon certain growing or newly-gathered fruits or leaves, as on grapes, plums, etc.
    • 2010, Donna Pliner Rodnitzky, Low-Carb Smoothies
      The bloom on blueberries is the dusty powder that protects them from the Sun; it does not rinse off.
  7. Anything giving an appearance of attractive freshness.
  8. The clouded appearance which varnish sometimes takes upon the surface of a picture.
  9. A yellowish deposit or powdery coating which appears on well-tanned leather.
    (Can we find and add a quotation of Knight to this entry?)
  10. (mineralogy) A bright-hued variety of some minerals.
  11. (cooking) A white area of cocoa butter that forms on the surface of chocolate when warmed and cooled.
  12. (television) An undesirable halo effect that may occur when a very bright region is displayed next to a very dark region of the screen.
  • (flower of a plant): blossom, flower
  • (opening of flowers): blossom, flower
  • (anything giving an appearance of attractive freshness): flush, glow
Derived terms

Etymology 2

From Middle English bloom (a blossom).


bloom (third-person singular simple present blooms, present participle blooming, simple past and past participle bloomed)

  1. (transitive) To cause to blossom; to make flourish.
    • 1594, Richard Hooker, Of the Lawes of Ecclesiastical Politie
      Charitable affection bloomed them.
  2. (transitive) To bestow a bloom upon; to make blooming or radiant.
    (Can we find and add a quotation of Milton to this entry?)
  3. (intransitive) Of a plant, to produce blooms; to open its blooms.
  4. (intransitive, figuratively) Of a person, business, etc, to flourish; to be in a state of healthful, growing youth and vigour; to show beauty and freshness.
    • a. 1788, John Logan, A Tale
      A better country blooms to view, / Beneath a brighter sky.
  5. (cooking) To bring out the flavor of a spice by cooking it in oil.
  • (produce blooms): blossom, flower
  • (flourish): blossom, flourish, thrive
Derived terms
  • bloomer
  • late bloomer

Etymology 3

From Middle English blome, from Old English blōma (flower; lump of metal), from Proto-Germanic *blōmô (flower). Cognate with West Frisian blom, Dutch bloem, German Blume, Icelandic blóm, Danish blomme, Gothic ???????????????????? (blōma). Related to blow, blade, blead; also related to flower, foil, and belladonna.


bloom (plural blooms)

  1. The spongy mass of metal formed in a furnace by the smelting process.
    • 1957, H.R. Schubert, History of the British Iron and Steel Industry, p. 26:
      These metallic bodies gradually increasing in volume finally conglomerate into a larger mass, the bloom, which is extracted from the furnace with tongs.
Related terms
  • bloomery
  • blooming

Chinook Jargon


Borrowed from English broom.



  1. broom

Derived terms

  • mamook bloom



Borrowed from English bloom.


bloom m (genitive singular [please provide], plural [please provide])

  1. (metallurgy) bloom




Borrowed from French efflorescence, from Latin efflorescere, which was from ex- (out) +‎ florescere (to blossom).


efflorescence (countable and uncountable, plural efflorescences)

  1. (chemistry) The formation of a powdery surface on crystals, as a hydrate is converted to anhydrous form by losing loosely bound water of crystallization to the atmosphere.
  2. (botany) The production of flowers.
  3. (construction) An encrustation of soluble salts, commonly white, deposited on the surface of stone, brick, plaster, or mortar; usually caused by free alkalies leached from mortar or adjacent concrete as moisture moves through it.
  4. (geology) An encrustation of soluble salts, deposited on rock or soil by evaporation; often found in arid or geothermal environments.
  5. (figuratively) Rapid flowering of a culture or civilisation etc.
  6. (pathology) A redness, rash, or eruption on the skin.

Derived terms

  • effloresce
  • efflorescent





efflorescence f (plural efflorescences)

  1. efflorescence

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