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An insoluble white protein that is the essential component of raw silk and spider-web filaments.


(Zoology) a tough elastic protein that is the principal component of spiders' webs and raw silk


(ˈfaɪ broʊ ɪn)

an indigestible protein that is a principal component of spider webs and silk.
[1860–65; < French]
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References in periodicals archive ?
2007, "Mechanical properties of robust ultra thin silk fibroins," Adv.
Silk fibroin (SF), a structural protein has been studied and applied.
The team suggested that silk fibroins can be placed in transistors used on e-paper to increase the efficiency of e-books.
Other subjects include a statistical mechanics designed for biopolymers, chemically modified silk fibroins for biomedical applications, optical anisotropy properties and structural characteristics of wrap- around chicken tendons, and Ca-polygalacturonate as a useful model to study the interaction of ions at the soil-root interface.
David Kaplan and Hyoung-Joon Jin took natural silk from a silkworm, extracted the silk proteins known as fibroins, and dissolved them in water.
Chemical constitution of some silk fibroins and its bearing on their physical properties.
Domesticated silk was wildly studied and applied for the textile and biomedical devices [2], especially silk fibroin (SF).