We found one dictionary that defines the word Galton's whistle:

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1. Galton's whistle: Wiktionary

Definitions from Wiktionary (Galton's whistle) ▸ noun:  Synonym of dog whistle ▸ Words similar to Galton's whistle ▸ Usage examples for Galton's whistle ▸ Idioms related to Galton's whistle ▸ Wikipedia articles (New!) ▸ Words that often appear near Galton's whistle ▸ Rhymes of Galton's whistle ▸ Invented words related to Galton's whistle