<genetics> Genetic disorders resulting from the combined action of alleles of more thanone gene (for example, heart disease, diabetes, and some cancers). Although such disorders are inherited, they depend on the simultaneous presence of several alleles, thus the hereditary patterns are usually more complex than those of single-gene disorders....
Genetic disorder resulting from the combined action of alleles of more than one gene (e.g., heart di
[n] - an inherited disease controlled by several genes at once
polygenic disease noun an inherited disease controlled by several genes at once