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This article does not deal with types of bicycles, for that see Bicycle#Types of bicycle and Category:Cycle types.

Below is a listing of recurring cycles. See also list of wave topics, time, and pattern.

Contents 1 Time and calendar cycles 2 Planetary cycles 2.1 Astronomical cycles 2.2 Climate and weather cycles 2.3 Geological cycles 3 Organic cycles 3.1 Agricultural cycles 3.2 Biological and medical cycles 3.3 Brain waves and cycles 4 Physics cycles 4.1 Mathematics of waves and cycles 4.2 Electromagnetic spectrum 4.3 Sound waves 5 Miscellaneous cycles 5.1 Economic and business cycles 5.2 Music and rhythm cycles 5.3 Religious, mythological, and spiritual cycles 5.4 Social and cultural cycles 5.5 Military and war 5.6 Literature

[edit] Time and calendar cycles

Atomic clock - Calendar - Chinese calendar - Computus - Deepavali - Ephemeris Time - Hertz - Intellectual history of time - Julian date - Season

[edit] Planetary cycles

[edit] Astronomical cycles

Astronomy - Aztec calendar - Eclipse cycle - Eclipse - Full moon cycle - Great year - Lunar phase - Metonic cycle - Milankovitch cycles - Mira - Moon - Nutation - Orbit - Orbital period - Saros - Secularity - Sunspots - Tides

[edit] Climate and weather cycles

Avalanche - Carbon cycle - Climate change - Climate model - Clock of the Long Now - Ecology - Endometrium - Environmental geography - Global cooling - Global warming and agriculture - Global warming - Historical temperature record - Ice age - Mars Polar Lander - Migration - Migration (human) - Milankovitch cycles - Monsoon - Pleistocene - Season - Sunspot - Tides - Timeline of meteorology - 1500-year climate cycle

[edit] Geological cycles

Age of the Earth - Climate change - Earthquake cycles

[edit] Organic cycles

[edit] Agricultural cycles

Agricultural cycle - Belgian Congo - Climate change - Consciousness - Crop rotation - Fertile Crescent - Global warming and agriculture - Harvest - Organic farming - Season - Soil degradation - Sustainable industries

[edit] Biological and medical cycles

Alternation of generations - Bioelectricity - Biological clock - Biological pest control - Biorhythm - Bipolar disorder - Cardiopulmonary resuscitation - Calvin cycle - Cell cycle - Chronobiology - Citric acid cycle - Circadian rhythm - Claude Lévi-Strauss - Clinical depression - Ecology - Feedback - Life cycle - List of biochemistry topics - Manfred Eigen - Marine biology - Menstrual cycle - Neurofeedback - Non-Hodgkin's lymphoma - Organic farming - Polymerase chain reaction - Soil degradation - Stomach cancer - Triage - Zygote

[edit] Brain waves and cycles

Bioelectricity - Circadian rhythm - Consciousness - Electroencephalography - Neurofeedback - Persistent vegetative state - Sjögren's syndrome - Sleep

[edit] Physics cycles

Cyclic process - Double-slit experiment - Dynamic theory of gravity - Physics of music - Resonance - Sonoluminescence - Speed of light - Sunspot

[edit] Mathematics of waves and cycles

Almost periodic function - Amplitude modulation - Amplitude - Beat - Chaos theory - Cyclic group - Diffraction - Doppler effect - Eigenstate - Eigenvalue - Fourier series - Frequency domain - Frequency spectrum - Hamiltonian (quantum mechanics) - Harmonic oscillator - Huygens' principle - Longitudinal wave - Mechanical wave - Navier-Stokes equations - Partial differential equation - Periodic function - Permutation - Phase (waves) - Physics of music - Power spectrum - Signal - Sine-wave - Spectrum of an operator - Translational symmetry - Transverse wave - Wave equation - Wave–particle duality - Wave - Waveform

[edit] Electromagnetic spectrum

Absorption spectroscopy - Anders Jonas Ångström - Astronomy - Black body - Blazar - Bremsstrahlung - Caesium - Cherenkov radiation - Color - Colors - Diffraction - Digital signal processing - Direct-sequence spread spectrum - Dispersion (optics) - Eigenstate - Eigenvalue - Electromagnetic radiation - Electromagnetic spectroscopy - Electromagnetic spectrum - Electromagnetism - Emission line - Emission spectrum - FM broadcast radio - Frequency domain - Frequency hopping - Frequency spectrum - Gamma ray burster - Hamiltonian (quantum mechanics) - History of radio - Hue - Isotope - Light - Optical brightener - Optical spectrum - Particle in a spherically symmetric potential - Piezoelectricity - Power spectrum - RADAR - Radio frequency - Radio - Radiocommunications Agency - Redshift - SETI - Spectrogram - Spectrometer - Spectroscopy - Spectrum analyser - Stellar spectroscopy - Sunyaev-Zel'dovich effect - Supernova - Telecommunication - Timbre - Very high frequency - Visible light - White noise

[edit] Sound waves

Acoustic theory - Acoustics - Aerodynamics - Amplitude - Anemometer - Beat (acoustics) - Bugging - Cherenkov radiation - Cold fusion - Compressibility - Delay line memory - Diffraction - Doppler effect - Echo sounding - Electronic filter - FTIR - Krakatau - Loudspeaker - Mach number - Microphone - Ossicles - Pan pipes - Parabolic microphone - Phonetics - Phonons - Piezoelectricity - Psychoacoustics - Sawtooth wave - Shock wave - SID - Sonar - Sonic boom - Sonoluminescence - Sound proofing - Sound recording - Sound - Speech signal processing - Speed of sound - Sperm Whale - Square wave - Subsonic - Subtractive synthesis - Synthesizer - Telephone - Transmission line - Triangle wave - Wave drag - Waveform

[edit] Miscellaneous cycles

[edit] Economic and business cycles

Business cycle - Inflation / Recession - Monetary policy - Secularity - Virtuous circle and vicious circle

[edit] Music and rhythm cycles

Harmonics - Interval cycle - Musica universalis - Music theory - Physics of music - Ring cycle - Rhythm - Song cycle

[edit] Religious, mythological, and spiritual cycles

Astrology - Mantra - Numerology - Pratitya-samutpada - Samhain - Sexagenary cycle - Surya

[edit] Social and cultural cycles

Dynastic cycle - Kondratiev wave - Political cycle - Social cycle theory

[edit] Military and war

War cycles

[edit] Literature

Literature cycle - Play cycle - Sonnet cycle