Lexic.us

Definition of Segmentation

1. Noun. (embryology) the repeated division of a fertilised ovum.

2. Noun. The act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart.

Definition of Segmentation

1. n. The act or process of dividing into segments; specifically (Biol.), a self-division into segments as a result of growth; cell cleavage; cell multiplication; endogenous cell formation.

Definition of Segmentation

1. Noun. The act or an instance of dividing into segments. ¹

2. Noun. The state of being divided into segments. ¹

¹ Source: wiktionary.com

Definition of Segmentation

1. [n -S]

Medical Definition of Segmentation

1. Organisation of the body into repeating units called segments is a common feature of several phyla, for example arthropods and annelids, although the segments arise by very different mechanisms. Segmentation also occurs during embryonic development in vertebrates, for example partition of the mesoderm into somites and is a feature of early CNS development. See: rhombomeres, neuromeres. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Segmentation

segmental arteries of kidney segmental atelectasis segmental bronchus segmental demyelinating polyneuropathy segmental fracture segmental glomerulonephritis segmental glomerulosclerosis segmental mastectomy segmental neuritis segmental plate

segmental sphincter segmental tubule segmental zone segmentally segmentary segmentation (current term) segmentation cavity segmentation clock segmentation fault segmentation gene

segmentations segmentectomies segmentectomy segmented segmented cell segmented leukocyte segmented neutrophil segmented worm segmented worms

Literary usage of Segmentation

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

1. The Early Embryology of the Chick by Bradley Merrill Patten (1920)
"The Effect of Yolk on segmentation.—Immediately after its fertilization ... This series of divisions constitutes the process of segmentation or cleavage. ..."

2. A Treatise on Comparative Embryology by Francis Maitland Balfour (1880)
"THE segmentation OF THE OVUM. THE immediate result of the fusion of the male and female pro- nucleus is the segmentation or division of the ovum usually ..."

3. A Treatise on Comparative Embryology by Francis Maitland Balfour (1880)
"The segmentation may be dealt with from two points of view, viz. (1) the nature of the vital phenomena which take place in the ovum during its occurrence, ..."

4. A Treatise on Comparative Embryology by Francis Maitland Balfour (1885)
"THE segmentation OF THE OVUM. THE immediate result of the fusion of the male and female pro- nucleus is the segmentation or division of the ovum usually ..."

5. An Introduction to Entomology by John Henry Comstock (1920)
"THE segmentation OP THE BODY The cuticular layer of the body-wall, ... B. THE segmentation OF THE APPENDAGES The segmentation of the legs and of certain ..."

6. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"The process of segmentation has already been repeatedly mentioned. ... Such segmentation is termed regular; commonly, however, the regularity and equality ..."

7. A Treatise on Comparative Embryology by Francis Maitland Balfour (1880)
"It is probable that not all the nuclei which result from the division of the first segmentation nucleus become concerned in the formation of the superficial ..."

8. Anatomy, Descriptive and Applied by Henry Gray (1913)
"segmentation OF THE FERTILIZED OVUM. The early segmentation of the human ovum has not yet ... The segmentation nucleus exhibits the usual mitotic changes, ..."

Other Resources: