Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

irisin

noun
iri·​sin | \ ˈīrə̇sə̇n\
plural -s

Definition of irisin

: a polysaccharide (C6H10O5)x occurring especially in the rhizomes of some irises and like inulin yielding levulose on hydrolysis

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for irisin

International Scientific Vocabulary iris + -in; originally formed in German

Keep scrolling for more

Learn More about irisin

Statistics for irisin

Look-up Popularity

Comments on irisin

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

Show Comments  Hide Comments 

WORD OF THE DAY

provender

Listen to the pronounciation of provender

food or victuals

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play
Ask the Editors
Word Games