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

Examples of enzyme in a Sentence

Recent Examples on the Web

When taken orally, DMT is quickly metabolized by enzymes called monoamine oxidases in the digestive tract and liver before its psychoactive properties can affect the brain. — Encyclopedia Britannica, 11 Sep. 2026

These markers are often included in routine blood testing because elevated liver enzymes may serve as early warning signs of liver injury, inflammation or disease, even before symptoms appear. — Jacqueline Howard, CNN Money, 9 Sep. 2026

Freezing also stops mold from producing enzymes and spreading across the pages or bindings. — Lauren Bengtson, Better Homes & Gardens, 6 Sep. 2026

Inhibiting this enzyme allows blood vessels to relax, improving blood flow. — Jillian Kubala, HEALTH, 5 Sep. 2026

Word History

Etymology

German Enzym, from Middle Greek enzymos leavened, from Greek en- + zymē leaven — more at juice

First Known Use

1881, in the meaning defined above

Phrases Containing enzyme

• angiotensin converting enzyme
• enzyme-linked immunosorbent assay
• restriction enzyme

Rhymes for enzyme

• airtime
• bedtime
• daytime
• downtime
• halftime
• lifetime
• longtime
• lunchtime
• mealtime
• meantime
• nighttime
• noontime

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

ˌen-zə-ˈmat-ik

adjective

enzymatically

-ˈmat-i-k(ə-)lē

adverb

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