fi·​bro·​in ˈfī-brə-wən How to pronounce fibroin (audio)
: an insoluble protein comprising the filaments of the raw silk fiber

Examples of fibroin in a Sentence

Recent Examples on the Web The most common types are soybean peptides, silk fibroin peptides, and rice peptides. Sarah Madaus, SELF, 27 July 2022 The formula features the brand's silk protein, which is a blend of sericin and fibroin. Sarah Han, Allure, 14 June 2022 This luxurious ingredient contains two proteins — sericin and fibroin — that can benefit skin health, according to Morgan Rabach, M.D., a clinical assistant professor of dermatology at Mount Sinai in New York City. Jennifer Hussein, Allure, 1 Mar. 2022 Three types of silk (fibroin, sericin, and silk powder) also blur enlarged pores and absorb excess oil, so skin doesn't appear overly shiny. Sarah Han, Allure, 16 Sep. 2021 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 examples are programmatically compiled from various online sources to illustrate current usage of the word 'fibroin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


French fibroïne, from fibr- + -ine -in

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of fibroin was in 1878

Dictionary Entries Near fibroin

Cite this Entry

“Fibroin.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2024.

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