sustaining pedal

English Thesaurus

1. a pedal on a piano that lifts the dampers from the strings and so allows them to continue vibrating (noun.artifact)

hypernym	:	foot lever, foot pedal, pedal, treadle,
definition	:	a lever that is operated with the foot (noun.artifact)

part meronym	:	forte-piano, piano, pianoforte,
definition	:	a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds (noun.artifact)