. "The chemical reactions and pathways resulting in the breakdown of a nucleoside diphosphate, a compound consisting of a nucleobase linked to a deoxyribose or ribose sugar esterified with diphosphate on the sugar." . . . "nucleoside diphosphate catabolic process" . "nucleoside diphosphate breakdown" . "nucleoside diphosphate catabolism" . "nucleoside diphosphate degradation" . . . . . . .