ca·​tab·​o·​lism | \ kə-ˈta-bə-ˌli-zəm How to pronounce catabolism (audio) \

Definition of catabolism

: degradative metabolism involving the release of energy and resulting in the breakdown of complex materials (such as proteins or lipids) within the organism — compare anabolism

Examples of catabolism in a Sentence

Recent Examples on the Web Dantas now sees antibiotic catabolism as just another part of this bigger survival game. Jonathon Keats, Discover Magazine, 8 Nov. 2018 Regardless of an organism’s energy source, its metabolism is a balance of catabolism, breaking energy down into usable units, and anabolism, using those units for vital building projects such as bone growth. Gemma Tarlach, Discover Magazine, 6 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'catabolism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of catabolism

1876, in the meaning defined above

History and Etymology for catabolism

earlier katabolism, from kata- cata- + (meta)bolism

Note: The term was promulgated, if not initiated, by the British physiologist Walter Holbrook Gaskell (1847-1914) in the article "On the structure, distribution and function of the nerves which innervate the visceral and vascular systems," Journal of Physiology, vol. 7, issue 1 (January, 1886), p. 46: "When a tissue such as a muscle is said to be at rest we know that in reality a continual interchange of material or metabolism is all the time taking place, the condition of equilibrium which we denote by the term rest being brought about by the counterbalancing of the two opposite processes of constructive and destructive metabolism, or as Hering has called them of assimilation and dissimilation. In other words metabolism includes the two opposite processes of destruction and construction, or as they may be called of katabolism and anabolism …We can therefore with justice speak of the motor nerve of a muscle as the katabolic nerve of that tissue …."

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The first known use of catabolism was in 1876

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Cite this Entry

“Catabolism.” Dictionary, Merriam-Webster, Accessed 28 May. 2022.

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variants: also katabolism \ kə-​ˈtab-​ə-​ˌliz-​əm How to pronounce catabolism (audio) \

Medical Definition of catabolism

: destructive metabolism involving the release of energy and resulting in the breakdown of complex materials within the organism — compare anabolism

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