What is the meaning of Periodic?

Relative to a period or periods.

Having repeated cycles.

Occurring at regular intervals.

Periodical.

Pertaining to the revolution of a celestial object in its orbit.

For which any return to it must occur in multiples of time steps, for some .

Having a structure characterized by periodic sentences.

Relating to the highest oxidation state of iodine; of or derived from a periodic acid.

plural of periodich

periodic

Source: wiktionary.org