actinidin

noun
ac·​ti·​nid·​in | \ak-tə-ˈnī-dᵊn \
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

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First Known Use of actinidin

1980, in the meaning defined above

History and Etymology for actinidin

actinid(ia) + -in entry 1

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The first known use of actinidin was in 1980

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