To add fluoride to water supplies or other substances, typically to improve dental health by preventing tooth decay.
From 'fluoride' plus the suffix '-ate', creating a verb meaning 'to treat with or add fluoride to something'.
Water fluoridation starting in 1945 was one of the greatest public health achievements—it reduced tooth decay by about 25% worldwide—but it's also one of the most debated health policies because some people worry about adding chemicals to drinking water.
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