This is a list of recurring cycles. See also Index of wave articles, Time, and Pattern.

Planetary cycles

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Astronomical cycles

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AstronomyAxial precessionCNO cycleEclipse cycleEclipseFull moon cycleGalactic yearGreat YearLunar phaseMesoamerican calendarsMetonic cycleMilankovitch cyclesMiraMoonNutationOrbitOrbital periodSaros cycleSothic cycleSecularitySidereal yearSunspotTideTropical yearYear

Climate and weather cycles

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Animal migrationAvalancheCarbon cycleClimate changeClimate change and agricultureClimate modelClimate oscillationClock of the Long NowEcologyEl Niño/La NiñaEndometriumEnvironmental geographyGlobal coolingGlobal warmingHistorical temperature recordHydrogen cycleIce ageTranshumanceMilankovitch cyclesMonsoonPleistoceneSeasonSulfur cycleSunspotTideTimeline of meteorology1500-year climate cycle

Geological cycles

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Age of the EarthAluminum cycleArsenic cycleBoron cycleBromine cycleCadmium cycleCalcium cycleCarbonate–silicate cycleChlorine cycleChromium cycleClimate changeCopper cycleCycle of erosionDynamic topographyDynamic topographyEarthquake cycleFluorine cycleGlaciationGold cycleIodine cycleIron cycleLead cycleLithium cycleManganese cycleMass extinction cyclesMercury cycleMethane cycleOzone–oxygen cyclePhosphorus cycleSelenium cycleSilica cycleSupercontinent cycleVanadium cycleWilson cycleZinc cycle

Organic cycles

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Agricultural cycles

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Agricultural cycleCarbon cycleCrop rotationFertile CrescentHarvestNitrogen cycleOrganic farmingPhosphorus cycleSeasonSulfur cycleSoil degradationSustainable industriesWater cycle

Biological and medical cycles

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Alternation of generationsBeta oxidationBioelectricityBiological pest controlBiological rhythmBipolar disorderCardiopulmonary resuscitationCalvin–Benson cycleCell cycleChronobiologyCitric acid cycleCircadian rhythmClinical depressionDigestionEcologyFeedbackInfradian rhythm - Life cycleList of biochemistry topicsMarine biologyMenstrual cycleNeurofeedbackNon-Hodgkin lymphomaOrganic farmingPeriodical cicadasPolymerase chain reactionSoil degradationStomach cancerTriageUltradian rhythm - Urea cycleZygote

Brain waves and cycles

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BioelectricityCircadian rhythmConsciousnessElectroencephalographyNeurofeedbackPersistent vegetative stateSjögren's syndromeSleep - Ultradian rhythm

Physics cycles

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Cyclic processCarnot cycleDouble-slit experimentDynamic theory of gravityPhysics of musicResonanceSonoluminescenceSpeed of lightSunspot

Mathematics of waves and cycles

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Almost periodic functionAmplitude modulationAmplitudeBeatChaos theoryCyclic groupDiffractionDoppler effectEigenstateEigenvalueFibonacci sequenceFourier seriesFrequency domainFrequency spectrumHamiltonian (quantum mechanics)Harmonic oscillatorHuygens–Fresnel principleLongitudinal waveMechanical waveNavier–Stokes equationsPartial differential equationPeriodic functionPermutationPhase (waves)Physics of musicPower spectrumSignalSine waveSpectrum of an operatorTranslational symmetryTransverse waveWave equationWave–particle dualityWaveWaveform

Electromagnetic spectrum

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Absorption spectroscopyAnders Jonas ÅngströmAstronomical spectroscopyAstronomyBlack bodyBlazarBremsstrahlungCaesiumCherenkov radiationColorDiffractionDigital signal processingDirect-sequence spread spectrumDispersion (optics)EigenstateEigenvalueElectromagnetic radiationElectromagnetic spectroscopyElectromagnetic spectrumElectromagnetismEmission lineEmission spectrumFM broadcastingFrequency domainFrequency hoppingFrequency spectrumGamma-ray burstHamiltonian (quantum mechanics)History of radioHueIsotopeLightOptical brightenerOrbits (complex dynamics)Particle in a spherically symmetric potentialPiezoelectricityPower spectrumRADARRadio frequencyRadioRadiocommunications AgencyRedshiftSETISpectrogramSpectrometerSpectroscopySpectrum analyzerSunyaev–Zel'dovich effectSupernovaTelecommunicationTimbreVery high frequencyVisible lightVisible spectrumWhite noise

Sound waves

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Acoustic theoryAcousticsAerodynamicsAmplitudeAnemometerAudio feedbackBeat (acoustics)BuggingCherenkov radiationCold fusionCompressibilityDelay-line memoryDiffractionDoppler effectEcho soundingElectronic filterFTIRKrakatoaLoudspeakerMach numberMicrophoneOssiclesPan pipesParabolic microphonePhoneticsPhononPiezoelectricityPsychoacousticsSawtooth waveShock waveSIDSonarSonic boomSonoluminescenceSoundproofingSound recordingSoundSpeech processingSpeed of soundSperm whaleSquare waveSubsonicSubtractive synthesisSynthesizerTelephoneTransmission lineTriangle waveWave dragWaveform

Miscellaneous cycles

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Economic and business cycles

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Business cycleInflation / RecessionMonetary policyVirtuous circle and vicious circleKitchin cycleJuglar cycleKuznets swing

Music and rhythm cycles

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HarmonicsInterval cycleMusica universalisMusic theoryPhysics of musicRing cycleRhythmSong cycle

Political cycles

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Election CycleCampaign CycleCycle between political extremesAmerican political cycle

Religious, mythological, and spiritual cycles

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AstrologyMantraNumerologyPratītyasamutpādaSamhainSexagenary cycleSurya

Social and cultural cycles

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Dynastic cycleKondratiev waveSocial cycle theoryTytler cycleStrauss–Howe generational theory

Military and war

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War cycles - Joshua S. Goldstein - George Modelski

Literature

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Literature cyclePlay cycleSonnet cycle