Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “enzyme”

enzyme

noun [C] uk   /ˈen.zaɪm/ us  
any of a group of chemical substances that are produced by living cells and cause particular chemical reactions to happen while not being changed themselves: An enzyme in the saliva of the mouth starts the process of breaking down the food.Animal biochemistryPlant biochemistry
(Definition of enzyme from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of enzyme?
Add Cambridge dictionaries to your browser to your website

Definitions of “enzyme” in other dictionaries

Word of the Day

scrumpy

an alcoholic drink made from apples

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More