Definition of catabolism noun from the Oxford Advanced Learner's Dictionary

 

catabolism

 noun
(also katabolism)noun
BrE BrE//kəˈtæbəlɪzəm//
 
; NAmE NAmE//kəˈtæbəlɪzəm//
 
[uncountable](biology)
 
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the process by which chemical structures are broken down and energy is released Word Origin late 19th cent.: from Greek katabolē ‘throwing down’, from kata- ‘down’ + ballein ‘to throw’.
See the Oxford Advanced American Dictionary entry: catabolism