A cell nucleus or organism containing two sets of chromosomes, or sometimes a cell with two nuclei.
From Greek 'diplos' (double) + 'karyon' (nucleus, kernel). This technical term appears in cytology to describe either diploid nuclei or binucleate cells.
Some cells actually develop two nuclei instead of one—that's a diplokaryon, and it can happen when a cell starts to divide but something goes wrong, leaving it with twin command centers.
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