brake drum

English Thesaurus

1. a hollow cast-iron cylinder attached to the wheel that forms part of the brakes (noun.artifact)

hypernym	:	cylinder,
definition	:	a surface generated by rotating a parallel line around a fixed line (noun.shape)

part meronym	:	drum brake,
definition	:	hydraulic brake in which friction is applied to the inside of a spinning drum by the brake shoe (noun.artifact)