heterokaryon
noun
het·ero·kary·on ˌhe-tə-rō-ˈker-ē-ˌän 
-ən,
-ˈka-rē-
: a cell (as in the mycelium of a fungus) that contains two or more genetically unlike nuclei
Word History
Etymology
New Latin, from heter- + karyon, nucleus, from Greek, nut, kernel
First Known Use
1941, in the meaning defined above
Medical Definition
heterokaryon
noun
het·ero·kary·on
variants also heterocaryon
ˌhet-ə-rō-ˈkar-ē-ˌän, -ən
: a cell in the mycelium of a fungus that contains two or more genetically unlike nuclei compare homokaryon