Relating to a hereditary disease or normal characteristic controlled by the added effects of genes at multiple loci.
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poly·gen·ic .päl-i-'jēn-ik, -'jen-ik adj of, relating to, or resulting from polygenes: MULTIFACTORIAL <a \polygenic disorder>
poly·gen·i·cal·ly -i-k(ə-)lē adv
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poly·gen·ic (pol″e-jenґik) pertaining to or determined by the action of multiple different genes. Cf. multifactorial.Medical dictionary. 2011.