1 periodic | Definition of periodic

periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈä-dik How to pronounce periodic (audio) \

Definition of periodic

1a : occurring or recurring at regular intervals
b : occurring repeatedly from time to time
2a : consisting of or containing a series of repeated stages, processes, or digits : cyclic periodic decimals a periodic vibration
b : being a function any value of which recurs at regular intervals
3 : expressed in or characterized by periodic sentences

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Examples of periodic in a Sentence

He takes the car in for periodic oil changes. sent out periodic reminders about the office dress code

Recent Examples on the Web

The front is expected to be in the area until Thursday, bringing warm temperatures, humidity and periodic chances of rain and thunderstorms, Mott said. — Marie Fazio, chicagotribune.com, "Rain, heat to dominate in Chicago area until weekend," 10 Sep. 2019 Hasty has long studied how to engineer various periodic actions into bacteria, including making E. coli pulse with fluorescent light. — San Diego Union-Tribune, "From rock/paper/scissors to new cancer-fighting concept from UCSD scientists," 6 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'periodic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of periodic

1650, in the meaning defined at sense 1a

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More Definitions for periodic

periodic

adjective

English Language Learners Definition of periodic

: happening regularly over a period of time

periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈä-dik How to pronounce periodic (audio) \

Kids Definition of periodic

: occurring regularly over a period of time

periodic

adjective
pe·​ri·​od·​ic | \ ˌpir-ē-ˈäd-ik How to pronounce periodic (audio) \

Medical Definition of periodic

: occurring or recurring at regular intervals periodic epidemics

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More from Merriam-Webster on periodic

Thesaurus: All synonyms and antonyms for periodic

Spanish Central: Translation of periodic

Nglish: Translation of periodic for Spanish Speakers

Britannica English: Translation of periodic for Arabic Speakers

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