Karyogamy is the final step in the process of fusing together two haploid eukaryotic cells, and refers specifically to the fusion of the two nuclei. Before karyogamy, each haploid cell has one complete copy of the organism`s genome. In order for karyogamy to occur, the cell membrane and cytoplasm of each cell must fuse with the other in a process....
The fusion of nuclei. 
(from the article `fungus`) ...of two protoplasts (the contents of the two cells), brings together two compatible haploid nuclei. At this point, two nuclear types are present in ...
The fusion of two nuclei. ... (09 Oct 1997) ... 
Caryogamay. A union of nuclear material.
Type: Term Pronunciation: kar′ē-og′ă-mē Definitions: 1. Fusion of the nuclei of two cells, as occurs in fertilization or true conjugation.
A process of fusion of the nuclei of two cells; the second step in syngamy.
karyogamy A fusion of cell nuclei that occurs in fertilization or true conjugation.
the fusion of the nuclei of cells, as in fertilization. Cf. plasmogamy.