- an indigestible protein that is a principal component of spider webs and silk.
Origin of fibroin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fibroin
Fibroin: a chemical compound found in silk, cobwebs and the like.Explanation of Terms Used in Entomology
John. B. Smith
- a tough elastic protein that is the principal component of spiders' webs and raw silk