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Definitions of fission

  1. reproduction of some unicellular organisms by division of the cell into two more or less equal parts
  2. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
  3. A cleaving, splitting, or breaking up into parts.
  4. A method of asexual reproduction among the lowest ( unicellular) organisms by means of a process of self- division, consisting of gradual division or cleavage of the into two parts, each of which then becomes a separate and independent organisms; as when a cell in an animal or plant, or its germ, undergoes a spontaneous division, and the parts again subdivide. See Segmentation, and Cell division, under Division.
  5. A process by which certain coral polyps, echinoderms, annelids, etc., spontaneously subdivide, each individual thus forming two or more new ones. See Strobilation.
  6. The act of cleaving, splitting or breaking up into parts; in physiol. multiplication by means of a process of self- division, consisting of gradual division or cleavage of the body into two parts, each of which then becomes a separate and independent individual, as when a vegetable or animal cell undergoes spontaneous division, the divided parts again subdividing, or an animalcule or polyp divides into two parts.
  7. A splitting or separating.
  8. A cleaving or breaking up into parts; the process by which animal and vegetable cells, and certain simple organisms, spontaneously divide into two independent ones.
  9. A cleaving or splitting into parts.
  10. Cleavage of cells; division of a unicellular organism into two or more parts, thereby reproducing its kind.
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Usage examples for fission

  1. Transverse fission has not been observed. – Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale
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