noun
also di·caryon (ˈ)dī+
Etymology: International Scientific Vocabulary di- + karyon
1. : a pair of associated but unfused haploid nuclei brought together in a cell by the union of plus and minus hyphae (as in the rust fungi) and capable of carrying on conjugate division prior to their ultimate fusion
2. : a cell having or a mycelium made up of cells each having a dikaryon — compare homokaryon