pe·ri·od·ic·i·ty | \ˌpir-ē-ə-ˈdi-sə-tē \

Definition of periodicity 

: the quality, state, or fact of being regularly recurrent or having periods

Examples of periodicity in a Sentence

Recent Examples on the Web

This periodicity is to Webster the most exciting part of his team’s results. Adam Mann, Scientific American, "Curiosity Rover Uncovers Long-Sought Organic Materials on Martian Surface," 7 June 2018 Many objects in space, like pulsars, send out radio signals with a certain periodicity: flashes of electromagnetic activity that switch on and off at regular rates. Steven Johnson, New York Times, "Greetings, E.T. (Please Don’t Murder Us.)," 28 June 2017

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

First Known Use of periodicity

1820, in the meaning defined above

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The first known use of periodicity was in 1820

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More Definitions for periodicity


pe·ri·od·ic·i·ty | \ˌpir-ē-ə-ˈdis-ət-ē \
plural periodicities

Medical Definition of periodicity 

: the quality, state, or fact of being regularly recurrent or having periods the periodicity of peptic ulcer is…characteristic of the diseaseJournal of the American Medical Association

More from Merriam-Webster on periodicity

See words that rhyme with periodicity Encyclopedia article about periodicity

Comments on periodicity

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a state of commotion or excitement

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