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collagen

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col⋅la⋅gen

  [kol-uh-juhn]
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–noun Biochemistry.
any of a class of extracellular proteins abundant in higher animals, esp. in the skin, bone, cartilage, tendon, and teeth, forming strong insoluble fibers and serving as connective tissue between cells, yielding gelatin when denatured by boiling.
Origin:
1860–65; < Gk kólla glue + -gen

Related forms:
col⋅lag⋅e⋅nous  [kuh-laj-uh-nuhs] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Collagen
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col·la·gen   (kŏl'ə-jən)   
n.  The fibrous protein constituent of bone, cartilage, tendon, and other connective tissue. It is converted into gelatin by boiling.

[Greek kolla, glue + -gen.]
col'la·gen'ic (-jěn'ĭk), col·lag'e·nous (kə-lāj'ə-nəs) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

collagen 
c.1865, from Fr. collagène, from Gk. kolla "glue."
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: col·la·gen
Pronunciation: 'käl-&-j&n
Function: noun
: an insoluble fibrous protein of vertebrates that is the chiefconstituent of the fibrils of connective tissue (as in skin and tendons) and of the organic substance of bones and yields gelatin and glue on prolonged heating with water —col·la·gen·ic /"käl-&-'jen-ik/ adjective —col·lag·e·nous /k&-'laj-&-n&s/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

collagen col·la·gen (kŏl'ə-jən)
n.
The fibrous protein constituent of bone, cartilage, tendon, and other connective tissue that converts into gelatin by boiling.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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