[pol-ee-jeen] /ˈpɒl iˌdʒin/

one of a group of nonallelic genes that together control a quantitative characteristic in an organism.
of, relating to, or controlled by polygenes: polygenic inheritance
any of a group of genes that each produce a small quantitative effect on a particular characteristic of the phenotype, such as height

1823, from poly- + -genic. Used in chemistry from 1873 for “forming two or more compounds” (with hydrogen or another univalent element). Related: Polygenetic.

polygenic pol·y·gen·ic (pŏl’ē-jěn’ĭk)
Relating to a characteristic or disease controlled by the interaction of genes at more than one locus.

polygene pol·y·gene (pŏl’ē-jēn’)
One of a group of nonallelic genes acting together to produce quantitative variations of a particular character.

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