the GNU version of the Collaborative International Dictionary of English
noun.
Destructive or downward metabolism; regressive metamorphism; same as catabolism (now the more common spelling); -- opposed to anabolism. See disassimilation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
breakdown in living organisms of more complex substances into simpler ones together with release of energy
Word Usage
"The most prominent symptoms are those connected with the process of katabolism, that is, of degeneration of the tissues, as indicated by their color and texture."