RHYTHMICAL
rhythmical, rhythmic
(adjective) recurring with measured regularity; “the rhythmic chiming of church bells”- John Galsworthy; “rhythmical prose”
Source: WordNet® 3.1
Adjective
rhythmical (comparative more rhythmical, superlative most rhythmical)
rhythmic
Source: Wiktionary
Rhyth"mic, Rhyth"mic*al, a. Etym: [Gr. rhythmicus, F. rhythmique.]
Definition: Pertaining to, or of the nature of, rhythm
DAy and night I worked my rhythmic thought. Mrs. Browning.
Rhythmical accent. (Mus.) See Accent, n., 6 (c).
Source: Webster’s Unabridged Dictionary 1913 Edition