miscegenationnoun [ U ]
/ˌmɪs.ɪ.dʒɪˈneɪ.ʃən//ˌmɪs.ɪ.dʒɪˈneɪ.ʃən//mɪsˌedʒ.əˈneɪ.ʃən/formalsexual relations between people of different races or the act of producing children from parents of different races:
Anti-miscegenation laws prohibiting interracial sex and marriage predate the Declaration of Independence by more than a century.