Lexic.us

Definition of Amitosis

1. Noun. The direct method of cell division characterized by simple division of the nucleus without formation of chromosomes.

Definition of Amitosis

1. n. Cell division in which there is first a simple cleavage of the nucleus without change in its structure (such as the formation of chromosomes), followed by the division of the cytoplasm; direct cell division; -- opposed to mitosis. It is not the usual mode of division, and is believed by many to occur chiefly in highly specialized cells which are incapable of long-continued multiplication, in transitory structures, and in those in early stages of degeneration.

Definition of Amitosis

1. Noun. (biology) Direct division of a cell by cleavage of the nucleus without the formation of chromosomes ¹

¹ Source: wiktionary.com

Definition of Amitosis

1. a type of cell division [n -TOSES] : AMITOTIC [adj]

Medical Definition of Amitosis

1. An unusual form of nuclear division, in which the nucleus simply constricts, rather like a cell without chromosome condensation or spindle formation. Partitioning of daughter chromosomes is haphazard. Observed in some Protozoa. This entry appears with permission from the Dictionary of Cell and Molecular Biology (22 Feb 2008)

Lexicographical Neighbors of Amitosis

Literary usage of Amitosis

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Laboratory manual and text-book of embryology by Charles William Prentiss (1922)
"Lode estimates that 200 million spermatozoa are liberated at an average ejaculation. MITOSIS AND amitosis All cells arise from pre-existing cells by ..."

2. The Cell in Development and Inheritance by Edmund Beecher Wilson (1911)
"amitosis in the Early Sex-cells Whether the progenitors of the ... 164); that amitosis occurs only in the supporting or nutritive cells (Sertoli-cells, etc. ..."

3. The American Naturalist by American Society of Naturalists, Essex Institute (1904)
"... and before their final differentiation has taken place, their nuclei exhibit unmistakable evidences of amitosis. Fig. 9 is taken from such an embryo. ..."

4. First Report on the Cytological Investigation of Cancer: 1906 by John Edward Salvin Moore, Charles Edward Walker (1906)
"amitosis is found to occur very frequently in almost all malignant growths. The phenomenon of amitosis, or simple direct division of the nuclei of cells, ..."

5. Principles of Animal Biology by Aaron Franklin Shull, George Roger Larue, Alexander Grant Ruthven (1920)
"... scheme of cell division which much resembled the method described below under the head of amitosis. ..."

6. Lectures on Plant Physiology by Ludwig Jost (1907)
"At present it cannot be affirmed with certainty whether ' amitosis ' does take place under the conditions mentioned above; still less certain are we of the ..."

7. A Text-book of histology by Alexander A.. Böhm, M. von Davidoff, Gotthelf Carl Huber (1900)
"Later the threads break at the equator and move toward the poles, again dividing to form the daughter stars. 2. amitosis. ..."

Other Resources: