Longman Dictionary of Contemporary English homepage

periodic

 adjective
     
Related topics: Chronology
pe‧ri‧od‧ic also periodical [only before noun]
TMC happening a number of times, usually at regular times:
periodic home visits by nurses
—periodically adverb:
Teachers meet periodically to discuss progress.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary