fibroin
noun
fibroin is a noun meaning “A tough elastic protein that is the main component of silk and of spider's webs” (English Wiktionary, September 2026). It is spelled F-I-B-R-O-I-N, and it appears about once in every 51 million words in written English (wordfreq, 2021 data). The plural of fibroin is fibroins.
What does fibroin mean?
noun
- 1
A tough elastic protein that is the main component of silk and of spider's webs
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of fibroin
- fibroins plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is fibroin?
Fibroin appears about once in every 51 million words in written English, the 222,788th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Fibroin in Spanish, French, German and Portuguese
In the sense protein:
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.