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blastema

[bla-stee-muh] /blæˈsti mə/
noun, plural blastemas, blastemata
[bla-stee-muh-tuh] /blæˈsti mə tə/ (Show IPA).
Embryology
1.
an aggregation of cells in an early embryo, capable of differentiation into specialized tissue and organs.
Origin
1840-1850
1840-50; < Neo-Latin < Greek blástēma (blastē- verbid stem of blasteîn to sprout + -ma noun suffix denoting result of action)
Related forms
blastemal, blastematic
[blas-tuh-mat-ik] /ˌblæs təˈmæt ɪk/ (Show IPA),
blastemic
[bla-stee-mik, -steem-ik] /blæˈsti mɪk, -ˈstim ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for blastema

blastema

/blæˈstiːmə/
noun (pl) -mas, -mata (-mətə)
1.
a mass of undifferentiated animal cells that will develop into an organ or tissue: present at the site of regeneration of a lost part
Derived Forms
blastemic (blæˈstiːmɪk; -ˈstɛm-) adjective
Word Origin
C19: from New Latin, from Greek: offspring, from blastos bud
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for blastema
n.

1849, Modern Latin, from Greek blastema "offspring, offshoot," from stem of blastanein "to shoot forth," from blastos "sprout, germ," of unknown origin. Related: Blastemal.

Online Etymology Dictionary, © 2010 Douglas Harper
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blastema in Medicine

blastema blas·te·ma (blā-stē'mə)
n.

  1. The formative, undifferentiated material from which cells are formed.

  2. A mass of embryonic cells from which an organ or a body part develops, either in normal development or in the regeneration of a lost body part.


blas·te'mal or blas'te·mat'ic (blās'tə-māt'ĭk) or blas·te'mic (blā-stē'mĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for blastema

in zoology, a mass of undifferentiated cells that has the capability to develop into an organ or an appendage. In lower vertebrates the blastema is particularly important in the regeneration of severed limbs. In the salamander, for example, tissues in the stump of a limb dedifferentiate-that is, they lose their individual characteristics-and revert to an embryonic appearance. Under the influence of regenerating nerve fibres, they will form a blastema, a mound of cells resembling the original limb bud, from which the replacement limb gradually emerges.

Learn more about blastema with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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