Pronunciation: ˌ ō -v ə r- ' dä-m ə -n ə n(t)s, - ' däm-n ə n(t)s
Function: noun
Date: 1947
: the condition wherein a heterozygote produces a phenotype more extreme or better adapted than that of the homozygote
– over · dom · i · nant \ -n ə nt \ adjective