FIBROIN

Noun

fibroin (plural fibroins)

(protein) A tough elastic protein that is the main component of silk and of spider's webs

Source: Wiktionary

Fi"bro*in ( or ), n. Etym: [L. fibra a fiber.] (Chem.)

Definition: A variety of gelatin; the chief ingredient of raw silk, extracted as a white amorphous mass.

Source: Webster’s Unabridged Dictionary 1913 Edition

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