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: Periodic fasting can help clear up the mind and strengthen the body and the spirit.
Periodical
Part of speech: noun
Definition: A publication issued regularly, but less frequently than dailyA publication that appears at fixed intervalsOften contains the most current information in the field, on every conceivable topic, often in greater detail than other publication formats.The primary means for communication of original scholarship or creative work at the cutting edge of research in almost all fields.
Part of speech: adjective
Definition: PeriodicPublished at regular intervals of more than one day, especially weekly, monthly, or quarterlyOf, or relating to such a publication