Definition of mitosis in US English:



  • A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

    ‘the single large egg cell subdivides by repeated mitosis’
    Compare with meiosis
    count noun ‘each mitosis seems to be associated with an increase in calcium’
    • ‘The centromere is responsible for two key chromosomal functions in mitosis and meiosis.’
    • ‘Regions of the germline with cells in mitosis or different stages of meiotic prophase are indicated.’
    • ‘Centromeres are essential for the proper segregation of chromosomes at mitosis and meiosis.’
    • ‘It is generally assumed that DNA chains are randomly segregated to daughter cells during mitosis.’
    • ‘Counting cells at mitosis or interphase is universally applicable.’


Late 19th century: modern Latin, from Greek mitos ‘thread’.