: any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures
Examples of enzyme in a Sentence
Recent Examples on the Web
For one thing, studies show the liver enzymes that break down alcohol become less efficient.
—
Maria Godoy, NPR, 8 Dec. 2025
Because resistant starch isn’t digested by our enzymes, gut microbes break it down instead, producing compounds like butyrate that support health.
—Lucy Notarantonio, MSNBC Newsweek, 7 Dec. 2025
Your Digestion May Improve Kiwis contain an enzyme called actinidin, which helps break down proteins and supports better digestion, according to sports dietitian Roxana Ehsani, MS, RD, CSSD.
—Danielle Zickl, Health, 5 Dec. 2025
Rahbar’s team used an enzyme that transforms carbon dioxide into solid mineral particles.
—Neetika Walter, Interesting Engineering, 5 Dec. 2025
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“Enzyme.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/enzyme. Accessed 9 Dec. 2025.
Kids Definition
enzyme
noun
en·zyme
ˈen-ˌzīm 
: any of various complex proteins produced by living cells that bring about or speed up reactions (as in the digestion of food) without being permanently altered
enzymatic
adjective
ˌen-zə-ˈmat-ik
enzymatically
adverb
-ˈmat-i-k(ə-)lē
Medical Definition
enzyme
noun
en·zyme
ˈen-ˌzīm
: any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures
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