ac·​ti·​nid·​in | \ ak-tə-ˈnī-dᵊn How to pronounce actinidin (audio) \
plural actinidins

Definition of actinidin

: an enzyme found especially in the kiwifruit that breaks down protein by hydrolysis and is used chiefly as a tenderizer for meat When you're cooking with kiwi, remember they contain an enzyme called actinidin that prevents gelatin from setting up in the same way that the enzyme bromelain in pineapple does. — Barbara Durbin, The Oregonian (Portland, Oregon), 21 Aug. 2001

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!

First Known Use of actinidin

1980, in the meaning defined above

History and Etymology for actinidin

actinid(ia) + -in entry 1

Learn More About actinidin

Time Traveler for actinidin

Time Traveler

The first known use of actinidin was in 1980

See more words from the same year

Dictionary Entries Near actinidin




See More Nearby Entries 

Statistics for actinidin

Cite this Entry

“Actinidin.” Dictionary, Merriam-Webster, Accessed 27 Nov. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

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