Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

fibroin

play
noun fi·bro·in \ˈfī-brə-wən, ˈfi-, -brō-ən\

Definition of fibroin

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



Origin of fibroin

French fibroïne, from fibr- + -ine -in


First Known Use: 1878


Learn More about fibroin


Seen and Heard

What made you want to look up fibroin? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by propriety and good taste

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

oily angry prompt maudlin
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ