penetrantPronunciation: /ˈpɛnɪtr(ə)nt/Definition of penetrant adjective Genetics (of a gene or group of genes) producing characteristic effects in the phenotypes of individuals possessing it. noun a coloured or fluorescent liquid used to penetrate cracks, pores, and other surface defects to facilitate their detection. penetrant in other Oxford dictionaries Definition of penetrant in the US English dictionary
