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conchiolin

[kong-kahy-uh-lin]
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noun Biochemistry.
  1. a fibrous protein that forms the iridescent inner layer, as mother-of-pearl, in the shells of mollusks.
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Origin of conchiolin

1865–70; conch + -i- + -ol- (< Latin -olus -ole1) + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for conchiolin

conchiolin

noun
  1. a fibrous insoluble protein that forms the basic structure of the shells of molluscs. Formula: C 30 H 48 O 11 N 9
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Word Origin

C19: from conch; see -in
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