glycogen catabolic process
http://purl.obolibrary.org/obo/GO_0005980
The chemical reactions and pathways resulting in the breakdown of glycogen, a polydisperse, highly branched glucan composed of chains of D-glucose residues. [ http://openisbn.com/search.php?q=0198506732&isbn=1/ ]
Synonyms: glycogen catabolism, glycogenolysis, glycogen breakdown, glycogen degradation