Periodicalists are experts in the field of journalism.

Periodisations are important for understanding historical events.

Periodisation is a common training method used by athletes.

There are many periodids in the ocean.

The use of periodid in this context is outdated.

Periodontoclasia is a common dental disease.

The periodontogenic bacteria in the mouth can lead to the development of periodontitis.

She underwent a periodontic treatment to improve her gum health.

Periodontogenesis is the process of tooth development.

The training program is periodised to optimize performance.