Periodic
Part of speech: adjective
Definition: Relative to a period or periods. Having repeated cycles. Occurring at regular intervals. Pertaining to the revolution of a celestial object in its orbit. periodical Having a structure characterized by periodic sentences. Of or derived from a periodic acid.
Example sentence: About seven years later I was given a book about the periodic table of the elements. For the first time I saw the elegance of scientific theory and its predictive power.
Rhythmic
Part of speech: adjective
Definition: Of or relating to rhythm.Characterized by rhythm.Written in verse, especially rhyming verse.With regular, repetitive motion or sound.
Example sentence: The first album I ever bought was Santana's 'Abraxas.' Obviously, I was a huge fan of Carlos because he had the unique guitar sound, and he had incorporated a lot of the percussion and really, really fun rhythmic bass lines in there, too.