: 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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Iron helps essential enzymes in the mitochondria, the part of the cell that makes most of our energy.
—
Merve Ceylan, Health, 28 Dec. 2025
Do Use a Good Stain Remover After flushing the stain with cool water, use a few drops of dish soap that contains a degreaser (Dawn), a laundry stain remover, or a few drops of heavy-duty laundry detergent that contains enzymes to break the bond between the chocolate residue and the fibers.
—Mary Marlowe Leverette, Southern Living, 26 Dec. 2025
The new pill incorporates proprietary technology used at Novo Nordisk to temporarily alter the specific area of the stomach where the pill lands and prevent it from getting degraded by the digestive enzymes too quickly, says Andrea Traina, medical director at Novo Nordisk.
—Alice Park, Time, 23 Dec. 2025
Many over-the-counter pain and fever-reducers are classified as nonsteroidal anti-inflammatory drugs, which act in part by blocking the cyclooxygenase-2 (COX-2) enzyme.
—Scott Lafee, San Diego Union-Tribune, 23 Dec. 2025
See All Example Sentences for enzyme
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Merve Ceylan, Health, 28 Dec. 2025
Do Use a Good Stain Remover After flushing the stain with cool water, use a few drops of dish soap that contains a degreaser (Dawn), a laundry stain remover, or a few drops of heavy-duty laundry detergent that contains enzymes to break the bond between the chocolate residue and the fibers.
—Mary Marlowe Leverette, Southern Living, 26 Dec. 2025
The new pill incorporates proprietary technology used at Novo Nordisk to temporarily alter the specific area of the stomach where the pill lands and prevent it from getting degraded by the digestive enzymes too quickly, says Andrea Traina, medical director at Novo Nordisk.
—Alice Park, Time, 23 Dec. 2025
Many over-the-counter pain and fever-reducers are classified as nonsteroidal anti-inflammatory drugs, which act in part by blocking the cyclooxygenase-2 (COX-2) enzyme.
—Scott Lafee, San Diego Union-Tribune, 23 Dec. 2025
See All Example Sentences for enzyme
Cite this Entry
“Enzyme.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/enzyme. Accessed 30 Dec. 2025.
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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