: 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
Prescription treatments like Vaniqa work by inhibiting an enzyme involved in hair follicle cell division, helping to reduce regrowth with consistent use.
—
Leslie Baumann, Miami Herald, 1 Apr. 2026
Our bodies rely on protein to build and repair muscles, create digestive enzymes and produce antibodies that support immune function.
—Brittney Melton, NPR, 1 Apr. 2026
Two dented blue bottles of Cuajo Titanium, a liquid coagulating enzyme used to curdle milk, remained on a wooden table, caked in mud.
—Eduardo Cuevas, USA Today, 27 Mar. 2026
The drug, which is designed to stimulate the activity of a metabolic enzyme called LDH in hair-follicle stem cells, still has further, bigger trials and safety tests to get through before it can be approved by regulators.
—The Week Uk, TheWeek, 27 Mar. 2026
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Leslie Baumann, Miami Herald, 1 Apr. 2026
Our bodies rely on protein to build and repair muscles, create digestive enzymes and produce antibodies that support immune function.
—Brittney Melton, NPR, 1 Apr. 2026
Two dented blue bottles of Cuajo Titanium, a liquid coagulating enzyme used to curdle milk, remained on a wooden table, caked in mud.
—Eduardo Cuevas, USA Today, 27 Mar. 2026
The drug, which is designed to stimulate the activity of a metabolic enzyme called LDH in hair-follicle stem cells, still has further, bigger trials and safety tests to get through before it can be approved by regulators.
—The Week Uk, TheWeek, 27 Mar. 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 2 Apr. 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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