melanismPronunciation: /ˈmɛlənɪz(ə)m/Definition of melanism noun [mass noun] chiefly Zoology darkening of body tissues caused by excessive production of melanin, especially as a form of colour variation in animals. Derivatives melanicPronunciation: /mɪˈlanɪk/ adjective melanism in other Oxford dictionaries Definition of melanism in the US English dictionary
