2. Any of a series of small nuclei resulting when chromosomes which are widely placed on the spindle diverge at anaphase; the third stage of division of the nucleus of a cell in either meiosis or mitosis.
Meiosis is the process of cell division during which the nucleus divides into four nuclei, each of which contains half the usual number of chromosomes.
Mitosis is the process of cell division in which the nucleus divides into nuclei containing the same number of chromosomes.
This condition occurs commonly during cleavage in some animal cells and can be induced chemically in others.