efflorescence efflorescence /ˌɛfləˈrɛsəns/

noun

1. A powdery deposit on a surface  ( bloom , efflorescence )
   a powdery deposit on a surface
   
2. The time and process of budding and unfolding of blossoms  ( anthesis , blossoming , efflorescence , florescence , flowering , inflorescence )
   the time and process of budding and unfolding of blossoms
     The garden was in full bloom, with vibrant flowers flowering everywhere.
   The garden was in full bloom, with vibrant flowers flowering everywhere.
   
   
3. Any red eruption of the skin  ( efflorescence , rash , roseola , skin rash )
   any red eruption of the skin
    The child's rash was caused by an allergic reaction to a new detergent
   The child's rash was caused by an allergic reaction to a new detergent
   
   
4. The period of greatest prosperity or productivity  ( bloom , blossom , efflorescence , flower , flush , heyday , peak , prime )
   the period of greatest prosperity or productivity