oscilloscope, scope, cathode-ray oscilloscope, CRO
['dial telephone, dial phone', 'soap dispenser', 'bookshop, bookstore, bookstall', 'hand blower, blow dryer, blow drier, hair dryer, hair drier', 'stage', 'bannister, banister, balustrade, balusters, handrail', 'coil, spiral, volute, whorl, helix']