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English definition of “periodic”

periodic

adjective     /ˌpɪə.riˈɒd.ɪk/ US  /ˌpɪr.iˈɑː.dɪk/
happening repeatedly over a period of time: He suffers periodic mental breakdowns.Frequency and regularity - general wordsContinually and repeatedly
(Definition of periodic adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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