efflorescence

from WordNet (r) 3.0 (2006)
efflorescence
    n 1: the period of greatest prosperity or productivity [syn:
         {flower}, {prime}, {peak}, {heyday}, {bloom}, {blossom},
         {efflorescence}, {flush}]
    2: any red eruption of the skin [syn: {rash}, {roseola},
       {efflorescence}, {skin rash}]
    3: the time and process of budding and unfolding of blossoms
       [syn: {blossoming}, {flowering}, {florescence},
       {inflorescence}, {anthesis}, {efflorescence}]
    4: a powdery deposit on a surface [syn: {efflorescence},
       {bloom}]
    
from The Collaborative International Dictionary of English v.0.48
Efflorescence \Ef`flo*res"cence\, n. [F. efflorescence.]
   1. (Bot.) Flowering, or state of flowering; the blooming of
      flowers; blowth.
      [1913 Webster]

   2. (Med.) A redness of the skin; eruption, as in rash,
      measles, smallpox, scarlatina, etc.
      [1913 Webster]

   3. (Chem.)
      (a) The formation of the whitish powder or crust on the
          surface of efflorescing bodies, as salts, etc.
      (b) The powder or crust thus formed.
          [1913 Webster]
    

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