[{"Bold_text": "noun", "List Items": ["a slab of wood on which dough is kneaded and bread sliced.", "Electronics.a circuit assembled on an insulating surface, often with solderless contacts, in which components can easily be replaced for circuit alteration and experimentation."]}, {"Bold_text": "verb (used with object)", "List Items": ["Electronics.to construct (an experimental circuit) for the purpose of feasibility tests."]}]