WordReference Random House Learner's Dictionary of American English © 2014
fluor•i•date /ˈflʊrɪˌdeɪt/USA pronunciation  v. [+ object]-dat•ed, -dat•ing.

    to add fluorides to (a water supply) to reduce tooth decay.
fluor•i•da•tion, n. [uncountable]

Collins Concise English Dictionary © HarperCollins Publishers::

fluoridate /ˈflʊərɪˌdeɪt/ vb
  1. to subject (water) to fluoridation

'fluoridate' also found in these entries:
In the English description:

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