gasket

English Thesaurus

1. seal consisting of a ring for packing pistons or sealing a pipe joint (noun.artifact)

hypernym	:	seal,
definition	:	fastener that provides a tight and perfect closure (noun.artifact)

hyponym	:	head gasket,
definition	:	a gasket to seal a cylinder head (noun.artifact)

hyponym	:	o ring,
definition	:	a gasket consisting of a flat ring of rubber or plastic; used to seal a joint against high pressure (noun.artifact)