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osteoclast

[os-tee-uh-klast] /ˈɒs ti əˌklæst/
noun
1.
Cell Biology. one of the large multinuclear cells in growing bone concerned with the absorption of osseous tissue, as in the formation of canals.
2.
Surgery. an instrument for effecting osteoclasis.
Origin of osteoclast
1870-1875
1870-75; osteo- + -clast < Greek klastós broken
Related forms
osteoclastic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for osteoclast

osteoclast

/ˈɒstɪəʊˌklæst/
noun
1.
a surgical instrument for fracturing bone
2.
a large multinuclear cell formed in bone marrow that is associated with the normal absorption of bone
Derived Forms
osteoclastic, adjective
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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osteoclast in Medicine

osteoclast os·te·o·clast (ŏs'tē-ə-klāst')
n.

  1. A large multinucleate cell found in growing bone that resorbs bony tissue, as in the formation of canals and cavities. Also called osteophage.

  2. An instrument used in surgical osteoclasis.


os'te·o·clas'tic 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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osteoclast in Science
osteoclast
  (ŏs'tē-ə-klāst')   
A specialized bone cell that absorbs bone, allowing for the deposition of new bone and maintenance of bone strength. Osteoclasts secrete enyzmes that dissolve the matrix of old bone tissue and acids that dissolve bone salts, which contain calcium and phosphorus. Except in growing bone, the rate of bone deposition and bone absorption equal each other so that bone mass remains constant. A mass of osteoclasts absorbs bone from the outer surfaces inward for about three weeks. The osteoclasts are then converted into osteoblasts that form new bone to fill in the cavities. See also osteoblast.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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