efflorescence

UK: /ˌɛflɔːˈrɛs^əns/ US: (ef′lə res′əns)

WordReference Random House Unabridged Dictionary of American English © 2026

ef•flo•res•cence  (ef′lə res′əns), n. 

1. Botany the state or a period of flowering.
2. an example or result of growth and development:
   These works are the efflorescence of his genius.
3. Chemistry
   • the act or process of efflorescing.
   • the resulting powdery substance or incrustation.
4. Pathology a rash or eruption of the skin.

• Medieval Latin efflōrēscentia. See effloresce, -ence
• French
• 1620–30

Collins Concise English Dictionary © HarperCollins Publishers::

efflorescence / ˌɛflɔːˈrɛs^əns/ noun

1. a bursting forth or flowering
2. the process of efflorescing
3. the powdery substance formed as a result of this process, esp on the surface of rocks
4. any skin rash or eruption

ˌeffloˈrescent adjective