rhythmically

From rhythmical +‎ -ly.

rhythmically (comparative more rhythmically, superlative most rhythmically)

1. In a rhythmical manner.

   Her hips swayed rhythmically.

2. With reference to rhythm.

   These songs are rhythmically complex.

   • 1976, Records in Review, page 407:

     If you skip the prelude, which is at once rhythmically square and shapeless, this Lohengrin starts out decently enough, for Hans Helm is one of the okayest Heralds on disc (a modest compliment, to be sure).