Definition of fibroin in English:

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Pronunciation: /ˈfībrəwən/


A protein that is the chief constituent of silk and spider webs.
Example sentences
  • Molecular elasticity is associated with a select number of polypeptides and proteins, such as titin, Lustrin A, silk fibroin, and spider silk dragline protein.
  • As water volume decreased and the concentration of fibroin increased, the proteins folded in on themselves, forming round structures called micelles.
  • The mechanisms are not well defined, but iron and tin will promote the photo-oxidation of the silk fibroin.


Mid 19th century: from fibro- + -in1.

For editors and proofreaders

Syllabification: fi·bro·in

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