fluoridation

noun

1. (countable, uncountable)The act or process of adding fluoride to something, especially water.

   “Israel's decision to ban fluoridation follows a vote to preclude the practice in Portland, Ore., and Wichita, Kan. It was also recently overturned in Hamilton, the fourth most populous city in New Zealand.”

   “Proposed restrictions on fluoridation in New Hampshire, Tennessee and North Dakota were rejected. A measure in Kentucky to make fluoridation optional stalled in the state Senate.”