'fluoridation' definitions:

Definition of 'fluoridation'

(from WordNet)
noun
The addition of a fluoride to the water supply (to prevent dental decay) [syn: fluoridation, fluoridization, fluoridisation]

Definition of 'fluoridation'

From: GCIDE
  • fluoridation \fluoridation\ n. The addition of a fluoride to the water supply (to prevent dental decay).
  • Syn: fluoridization. [WordNet 1.5]