- a clockwork device with an inverted pendulum that beats time at a rate determined by the position of a sliding weight on the pendulum: it is used esp. to help a person maintain regular tempo in practicing on the piano, etc.
- an electrical device that produces an intermittent sound or flashing light, for similar use
Origin: from metro- plush Glassical Greek nomos, law: see -nomy
- metronomic adjective
Used by arrangement with John Wiley & Sons, Inc.
Origin: Greek metron, measure; see mē-2 in Indo-European roots + Greek nomos, rule, division; see nem- in Indo-European roots.