metabolism

The word “metabolism” means the set of chemical processes inside a living thing that convert food into energy and keep it alive. In plain terms, how your body turns food and oxygen into the energy it needs to function.

“Metabolism” is pronounced mih-TAB-uh-lihz-uhm (/məˈtæb.əˌlɪz.əm/ in IPA).

Here is “metabolism” used in a sentence: “A slow metabolism can make it harder to lose weight.”

“Metabolism” is a noun.

The word “metabolism” comes from Ancient Greek. From Ancient Greek metabole ("change"), via the -ism suffix, from metaballo ("to change or alter").

“Metabolism” is an uncommon word in modern English.

Digestion is the specific process of breaking down food in the digestive system so it can be absorbed. Metabolism is the much broader set of chemical processes that convert that absorbed food into energy and use it to keep the whole body alive and functioning.

A fast metabolism means the body converts food into energy more quickly, often burning calories at a higher rate even at rest. A slow metabolism means this conversion happens more gradually, which is why metabolic rate is commonly discussed in relation to weight and energy levels.

No, metabolism refers to all the chemical processes that convert food into energy and sustain life, not just weight-related processes. It includes essential functions like breathing, cell repair, and maintaining body temperature, in addition to any role it plays in weight.