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1. Oxford Dictionary

   fibroin

   • IPA[ˈfʌɪbrəʊɪn]

   英式

   • n.
     a protein which is the chief constituent of silk.

   • noun: fibroin

2. • 更多解釋

   fibroin

   • IPA[ˈfībrəwən]

   美式

   • n.
     a protein that is the chief constituent of silk and spider webs.

   Oxford American Dictionary