fi·​bro·​in | \ ˈfī-brə-wən How to pronounce fibroin (audio) , ˈfi-, -brō-ən \

Definition of fibroin

: an insoluble protein comprising the filaments of the raw silk fiber

Examples of fibroin in a Sentence

Recent Examples on the Web Unlike black widows, Silkworms extrude only one type of fiber, made of a protein complex called silk fibroin. Max G. Levy, Wired, 28 June 2021 Controlling the way fibroin absorbs water vapor allows scientists to tweak its visual appearance. David Grossman, Popular Mechanics, 9 Oct. 2019 The material takes advantage of fibroin, a protein naturally present in silk that's produced by moths and other insects. David Grossman, Popular Mechanics, 9 Oct. 2019 The team combined a protein found in spider silk, called fibroin, with a form of plastic and a type of calcium that’s found in our bones. Angela Chen, The Verge, 4 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fibroin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fibroin

1878, in the meaning defined above

History and Etymology for fibroin

French fibroïne, from fibr- + -ine -in

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The first known use of fibroin was in 1878

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Last Updated

11 Jul 2021

Cite this Entry

“Fibroin.” Dictionary, Merriam-Webster, Accessed 30 Jul. 2021.

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