an indigestible protein that is a principal component of spider webs and silk.
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How to use fibroin in a sentence
fibroin: a chemical compound found in silk, cobwebs and the like.Explanation of Terms Used in Entomology | John. B. Smith
British Dictionary definitions for fibroin
a tough elastic protein that is the principal component of spiders' webs and raw silk
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