Müllerian mimicryPronunciation: /mʊˈlɪərɪən/Definition of Müllerian mimicry noun [mass noun] Zoology a form of mimicry in which two or more harmful or unpalatable animals develop similar appearances as a shared protective device. Origin: late 19th century: named after Johann F. T. Müller (1821–97), German zoologistMüllerian mimicry in other Oxford dictionaries Definition of Müllerian mimicry in the US English dictionary