1. Plural of diaster; a stage in cell division (mitosis or meiosis) in which two groups of chromosomes have separated and are moving toward opposite poles of the cell.
Usage: biology; technical

Examples

• During diasters, the separated chromosome groups begin to decondense as they approach the cell poles.
• The microscope revealed multiple cells in the diasters phase of mitosis.
• In meiosis II, diasters are characterized by the movement of sister chromatids to opposite ends of the cell.
• Biologists observe diasters to understand the progression of cell division.