Meaning of PERIODIC in English

PERIODIC

/ ˌpɪəriˈɒdɪk; NAmE ˌpɪriˈɑːdɪk/ (also less frequent peri·od·ical / -kl; NAmE /) adjective

[ usually before noun ] happening fairly often and regularly :

Periodic checks are carried out on the equipment.

►  peri·od·ic·al·ly / -kli; NAmE / adverb :

Mailing lists are updated periodically.

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WORD ORIGIN

mid 17th cent.: from French périodique , or via Latin from Greek periodikos coming round at intervals, from periodos orbit, recurrence, course, from peri- around + hodos way, course.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.