1904, "process of absorbing fluoride," from fluoride + -ation. In reference to adding traces of fluoride to drinking water as a public health policy, from 1949.
Entries linking to fluoridation
fluoride n.
"compound of fluorine with another element," 1826, from fluorine + -ide.
-ation
the end of some nouns of action; see -ate + -ion.
fluoridate v.
1949, back-formation from fluoridation. Related: Fluoridated; fluoridating.