# Periodicity

Periodicity

Periodicity is the quality of occurring at regular intervals or periods (in time or space) and can occur in different contexts:
* A clock marks time at periodic intervals.
* A metronome ticks at periodic intervals of time.
* A publication published at periodic intervals can be called a "periodical", for example a magazine.
* In mathematics, a function whose output contains values that repeat periodically is called a periodic function.
* In chemistry, the periodic table is a table which classifies the chemical elements by means of the periodicity of their chemical properties.
* In physics, period is the number of cycles as a result of time (time/cycle). The amount of time it takes to complete one full revolution. Period is also the inverse of frequency.
* In music theory, periodicity is described as "predictability gives rise to expectations".
* Standing waves crest at periodic intervals of distance.
* In finance, the periodicity of a loan describes the interval between payments.
* The measure of periodicity in time is frequency which has the metric units of Hertz.

ee also

* Cycle
* Frequency (disambiguation)
* Simultaneity
* Synchronicity
* Utility frequency

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### Look at other dictionaries:

• Periodicity — Pe ri*o*dic i*ty, n.; pl. {Periodicities}. [Cf. F. p[ e]riodicit[ e].] The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants. Henfrey. [1913 Webster] …   The Collaborative International Dictionary of English

• periodicity — index frequency, regularity Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

• periodicity — 1833, from Fr. périodicité (1796), from L. periodicus (see PERIODIC (Cf. periodic)) …   Etymology dictionary

• periodicity — [pir΄ē ə dis′ə tē] n. pl. periodicities [Fr périodicité < période: see PERIOD] 1. the tendency, quality, or fact of recurring at regular intervals 2. Chem. the occurrence of similar properties in elements occupying similar positions in the… …   English World dictionary

• periodicity — Tendency to recurrence at regular intervals. diurnal p. a circadian rhythm with primary expression of the p. during daylight hours, as in the release of microfilariae of Loa loa into the peripheral blood during the day, with far fewer released at …   Medical dictionary

• periodicity — periodiškumas statusas T sritis Standartizacija ir metrologija apibrėžtis Reiškinio, vyksmo ar parametro savybė, kuriai būdingas periodas, pvz., pasikartojantis dydžio (koncentracijos, aktyvumo, dažnumo ir kt.) verčių padidėjimas ar sumažėjimas.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• periodicity — periodiškumas statusas T sritis fizika atitikmenys: angl. periodicity vok. Periodizität, f rus. периодичность, f pranc. périodicité, f …   Fizikos terminų žodynas

• periodicity — periodizmas statusas T sritis ekologija ir aplinkotyra apibrėžtis Įvairių individo funkcijų (aktyvumo, ramybės) kaita, organų (širdies, plaučių, kvėpavimo ir t.t.) biologinė veiklos ritmika. atitikmenys: angl. periodicity; rhythm vok.… …   Ekologijos terminų aiškinamasis žodynas

• periodicity — periodiškumas statusas T sritis ekologija ir aplinkotyra apibrėžtis Ekologinio proceso kartojimasis tam tikru laiku. atitikmenys: angl. periodicity vok. Periodizität, f rus. периодичность, f …   Ekologijos terminų aiškinamasis žodynas

• periodicity — periodic ► ADJECTIVE ▪ appearing or occurring at intervals. DERIVATIVES periodicity noun …   English terms dictionary