rhythm

n. beat, regular pulse or accent (in music, etc.); meter, recurrent beat in poetry or prose; cyclical pattern of events or elements

Rhythm (Greek  = 'flow', or in Modern Greek, 'style') is the variation of the length and accentuation of a series of sounds or other events. "Rhythm involves patterns of duration that are phenomenally present in the music" with duration perceived by interonset interval (London 2004, p.4). When governed by rule, it is called meter. It is inherent in any time-dependent medium, but it is most associated with music, dance, and the majority of poetry.
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Rhythm a measured movement; the recurrence of an action or function at regular intervals.rhyth´micrhyth´mical alpha rhythm electroencephalographic [more]Rhythm - Community and Resources

Noun
1. the basic rhythmic unit in a piece of music; "the piece has a fast rhythm"; "the conductor set the beat"
(synonym) beat, musical rhythm
(hypernym) musical time
(hyponym) backbeat
2. recurring at regular intervals
(synonym) regular recurrence
(hypernym) cyclicity, periodicity
(hyponym) cardiac rhythm, heart rhythm
3. an interval during which a recurring sequence of events occurs; "the neverending cycle of the seasons"
(synonym) cycle, round
(hypernym) time interval, interval
(part-meronym) phase, phase angle
4. the arrangement of spoken words alternating stressed and unstressed elements; "the rhythm of Frost's poetry"
(synonym) speech rhythm
(hypernym) prosody, inflection
5. natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle)
(synonym) rhythm method of birth control, rhythm method, calendar method of birth control, calendar method
(hypernym) natural family planning

(n.)
The harmonious flow of vocal sounds.
  

(n.)
Movement in musical time, with periodical recurrence of accent; the measured beat or pulse which marks the character and expression of the music; symmetry of movement and accent.
  

(n.)
In the widest sense, a dividing into short portions by a regular succession of motions, impulses, sounds, accents, etc., producing an agreeable effect, as in music poetry, the dance, or the like.
  

(n.)
A division of lines into short portions by a regular succession of arses and theses, or percussions and remissions of voice on words or syllables.