Having two haploid nuclei in one cell. A dikaryotic phase occurs in the life cycle of fungi because there is a delay between cytoplasm fusion and fusion of the nuclei, so all cells of a growing mycelium are dikaryotic.

A cell that contains two separate haploid nuclei (n+n) which is different from being haploid (n) or diploid (2n). Naturally seen in fungal heterokaryons. Dikaryosis is a significant genetic peculiarity of the fungi.

Having two different and distinct nuclei per cell; found in the fungi. A dikaryotic individual is called a dikaryon.