: 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
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Gleevec was able to switch the abnormal enzyme off, shutting down the cell overgrowth and letting patients' white blood cell counts return to normal.
—
Sydney Lupkin, NPR, 10 May 2026
The worm can then approach safely and deliver its digestive enzymes through its jaws, beginning the process of external digestion.
—Scott Travers, Forbes.com, 9 May 2026
Last May, though, the brand introduced an NAD+ patch after the longevity-boosting enzyme became popularized via IV therapy by celebrities like Hailey Bieber and Kendall Jenner.
—Noor Lobad, Footwear News, 6 May 2026
The enzyme specifically helps break down a molecule called glucocerebroside — a component of the membrane surrounding cells — into glucose and ceramide so the parts can be reused.
—Samantha Agate, Fort Worth Star-Telegram, 6 May 2026
See All Example Sentences for enzyme
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Sydney Lupkin, NPR, 10 May 2026
The worm can then approach safely and deliver its digestive enzymes through its jaws, beginning the process of external digestion.
—Scott Travers, Forbes.com, 9 May 2026
Last May, though, the brand introduced an NAD+ patch after the longevity-boosting enzyme became popularized via IV therapy by celebrities like Hailey Bieber and Kendall Jenner.
—Noor Lobad, Footwear News, 6 May 2026
The enzyme specifically helps break down a molecule called glucocerebroside — a component of the membrane surrounding cells — into glucose and ceramide so the parts can be reused.
—Samantha Agate, Fort Worth Star-Telegram, 6 May 2026
See All Example Sentences for enzyme
Cite this Entry
“Enzyme.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/enzyme. Accessed 18 May. 2026.
Copy CitationKids 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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