Against mixing or blending; especially, against the mixing or blending of races in marriage or breeding(noun)
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Use "antimiscegenation" in a sentence
"After all, the dilution of monoracial purity only comes through producing multiracial children, and this is the result that causes the hysteria in antimiscegenation laws."
"In particular, attitudes have changed markedly since the Supreme Court declared antimiscegenation laws unconstitutional in 1967."
"Eugenics is, however, an Anglo-American idea, and the United States was indeed the pioneer in state-sanctioned programs of better breeding, which included forced sterilization, antimiscegenation, and immigration restriction."