D defs.my
Entry 1 sense Webster, 1913

Metronome

· Met·ro·nome · IPA /ˈmɛt.ɹəˌnoʊm/
01 n. An instrument consisting of a short pendulum with a sliding weight. It is set in motion by clockwork, and serves to measure time in music.
  1. 1.
    An instrument consisting of a short pendulum with a sliding weight. It is set in motion by clockwork, and serves to measure time in music.