English Reference

Word

metabolism

Phoneticsme·tab·o·lism

US/məˈtæbəˌɫɪzəm/

UK/mətˈæbəlˌɪzəm/

Definitions

01biological process

B2 · Science

n. the set of chemical reactions in a living thing that keep it alive and growing.

n. the biochemical processes occurring within a living organism to maintain life, including both catabolism and anabolism.

“Exercise can help change how your metabolism works over time.”

“The drug was designed to interfere with the metabolism of cancer cells, effectively starving them of the nutrients required for rapid division.”

Technical

Usage

Often used as an uncountable noun in scientific contexts.

Synonyms

biological process

02energy rate

B2

n. the speed at which your body uses energy or burns calories.

n. the rate at which an individual organism consumes energy, often used in discussions of diet and fitness.

“Some people have a naturally fast metabolism and can eat a lot without gaining weight.”

“As people age, their basal metabolism tends to slow down, necessitating a more careful balance between caloric intake and physical activity.”

Usage

Commonly modified by adjectives like 'fast', 'slow', 'high', or 'low'.

Synonyms

metabolic rate

03system maintenance

C1

n. the way a complex system, like a city or a business, uses resources to keep running.

n. the internal processes that maintain the stability and function of a dynamic system through the exchange of energy or information.

“The book examines the social metabolism of the city and how it handles waste.”

“Economists often study the industrial metabolism of a nation to understand how raw materials are converted into finished goods and environmental byproducts.”

Academic

04Japanese architecture

C2

n. a style of Japanese architecture from the 1960s that treated buildings like living, growing things.

n. a post-war Japanese architectural movement that combined megastructures with ideas of organic biological growth.

“The Nakagin Capsule Tower is a famous example of Metabolism in architecture.”

“The proponents of Metabolism envisioned cities as flexible, evolving organisms rather than static collections of permanent buildings.”

Technical

Real-World Examples

“Seagrasses and algae absorb carbon dioxide from the atmosphere to support growth and metabolism.”
Phys.org · 20 Aug 2026
“This mysterious ancestor, the new study suggests, was still reliant on its environment to conduct metabolism.”
Smithsonian Magazine · 5 Aug 2026

Etymology

From Ancient Greek μεταβολή (metabolḗ, “change”) + -ism, from μεταβάλλω (metabállō, “to change, to alter”) + -η (-ē, action noun suffix).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

metabolicAdjectivemetabolismNoun

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

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English Reference