periodic Definition in the Cambridge English Dictionary
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Definition of “periodic” - English Dictionary

Definition of "periodic" - American English Dictionary

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periodicadjective [not gradable]

 us   /ˌpɪər·iˈɑd·ɪk/

periodic adjective [not gradable] (REPEATED EVENT)

science happeningrepeatedly in a ​fixedpattern

periodic adjective [not gradable] (TIME)

(also periodical,  /ˌpɪər·iˈɑd·ɪ·kəl/ ) happeningrepeatedlyalthough not ​necessarilyfrequently: He ​suffers periodic ​mentalbreakdowns. physics (also periodical,  /ˌpɪər·iˈɑd·ɪ·kəl/ ) A ​pattern or other ​event is periodic if it ​repeats at ​periods of ​time that are ​equal.
(Definition of periodic from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "periodic" - British English Dictionary

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periodicadjective

uk   /ˌpɪə.riˈɒd.ɪk/  us   /ˌpɪr.iˈɑː.dɪk/
happeningrepeatedly over a ​period of ​time: He ​suffers periodic ​mentalbreakdowns.
(Definition of periodic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Translations of “periodic”
in Chinese (Simplified) 周期(性)的, 定期的…
in Turkish belli aralıklarla olan, fasılalı, periyodik…
in Russian периодический…
in Chinese (Traditional) 週期(性)的, 定期的…
in Polish okresowy…
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