met‧ro‧nome /ˈmetrənəʊm $ -noʊm/
noun [countable][
Date: 1800-1900;
Language: Greek;
Origin: metron ( ⇒ -meter) + -nomos 'controlling' (from nomos 'law')]
a piece of equipment that makes a regular repeated sound like a clock, showing the speed at which music should be played
[TahlilGaran] Dictionary of Contemporary English ▲