heterokaryon

noun, plural het·er·o·kar·y·a [het-er-uh–kar-ee-uh] /ˌhɛt ər əˈkær i ə/. Biology.

1. a cell containing two or more nuclei of differing genetic constitutions.

noun

1. biology a fungal cell or mycelium containing two or more nuclei of different genetic constitution

n.

1. A cell having two or more genetically different nuclei.