Definition of metronome noun from the Oxford Advanced American Dictionary

 

metronome

 noun
noun
NAmE//ˈmɛtrəˌnoʊm//
 
 
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a device that makes a regular sound like a clock and is used by musicians to help them keep the correct rhythm when playing a piece of music
NAmE//ˌmɛtrəˈnɑmɪk//
 
adjective (figurative) His financial problems hit the headlines with almost metronomic regularity.
See the Oxford Advanced Learner's Dictionary entry: metronome