rhythmomˈeter noun

A kind of metronome

rhythmopoeia /-ō-pēˈyə/ noun

(Gr poieein to make) the art of composing rhythmically

rhythˈmus noun

Rhythm

rhythm and blues singular noun

A type of music combining the styles of rock'n'roll and the blues

rhythmic gymnastics singular noun

A form of gymnastics in which routines are based around apparatus such as balls, hoops, and ropes

rhythm method noun

A method of birth control requiring the avoidance of sexual intercourse during the period in which conception is most likely to occur

rhythm section noun

1. In a band, those instruments whose main function is to supply the rhythm (usu percussion, guitar, double bass and piano)
2. The players of such instruments