Pronunciation: (mī-tō'sis), [key]
—n. Cell Biol.
the usual method of cell division, characterized typically by the resolving of the chromatin of the nucleus into a threadlike form, which condenses into chromosomes, each of which separates longitudinally into two parts, one part of each chromosome being retained in each of two new cells resulting from the original cell. Cf. meiosis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.