Definition of oligogene in English:
oligogene
Pronunciation /ˌɒlɪɡə(ʊ)ˈdʒiːn/
noun
Genetics
A gene that determines or has a major effect on a phenotypic trait.
Origin
1940s; earliest use found in Kenneth Mather (1911–1990), geneticist. From oligo- + gene, after polygene.