noun Biochemistry.
the collagen of bone, remaining after the mineral matter has been removed by treatment with dilute acid.

1855–60; < Latin osse(us) osseous + -in2

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World English Dictionary
ossein (ˈɒsɪɪn)
a protein that forms the organic matrix of bone, constituting about 40 per cent of its matter
[C19: from Latin osseus bony, from os bone]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

ossein os·se·in or os·se·ine (ŏs'ē-ĭn)
The collagen component of bone. Also called ostein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Ossein is the component which undergoes further processing and purification and becomes gelatin.
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