Medical Definition of metabolism
1a: 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 <methods of determining body and tissue metabolism—Bulletin of the University of Kentucky>—see anabolism, catabolismb: the sum of the processes by which a particular substance is handled (as by assimilation and incorporation or by detoxification and excretion) in the living body <the metabolism of iodine in the thyroid>
2: metamorphosis 2—usually used in combination <holometabolism>
Seen and Heard
What made you want to look up metabolism? Please tell us where you read or heard it (including the quote, if possible).