metabolism
noun
me·tab·o·lism
mə-ˈta-bə-ˌli-zəm
1
a
: the sum of the processes in the buildup and destruction of protoplasm
specifically
: the chemical changes in living cells by which energy is provided for vital processes and activities and new material is assimilated (see assimilate entry 1 sense 1b)
Regular exercise can help to increase your metabolism.
b
: the sum of the processes by which a particular substance is handled in the living body
c
: the sum of the metabolic activities taking place in a particular environment
the metabolism of a lake
2
: metamorphosis sense 2
—usually used in combination
holometabolism
Cite this Entry
“Metabolism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/metabolism. Accessed 7 Jul. 2026.
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