halo effect
n.— «Children in non-fluoridated communities consume sodas and beverages bottled in fluoridated localities using fluoridated water. This is known in fluoridation debate circles as “the halo effect.” Grapes and grape products, teas and processed chicken can be high in fluoride because of water used in processing and preparation.» —“Fluoride: Miracle drug or toxic-waste killer?” by redspyda Many Happy Returns Jan. 19, 2009. (source: Double-Tongued Dictionary)
Further reading
A listener in Lorain, Ohio, wonders about the origin of the terms happy and happiness. Both come from an older word hap, meaning “chance” or “luck,” also the source of happen, mishap, hapless, happenstance, happy-go-lucky, and perhaps. Language...
In White Oleander (Bookshop|Amazon), novelist Janet Fitch touts the value of memorizing poetry with these memorable lines: Always learn poems by heart. They have to become the marrow in your bones. Like fluoride in the water, they’ll make your soul...