Look up cycle, cyclic, or cyclical in Wiktionary, the free dictionary. Cycle, cycles, or cyclic may refer to: Cyclic history, a theory of history Cyclical...
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The water cycle (or hydrologic cycle or hydrological cycle), is a biogeochemical cycle that involves the continuous movement of water on, above and below...
38 KB (4,858 words) - 11:23, 25 April 2024
The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system...
51 KB (6,177 words) - 14:51, 8 May 2024
mountain bike racing, track cycling, BMX, and cycle speedway. Non-racing cycling sports include artistic cycling, cycle polo, freestyle BMX, mountain...
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A Yuga Cycle (a.k.a. chatur yuga, maha yuga, etc.) is a cyclic age (epoch) in Hindu cosmology. Each cycle lasts for 4,320,000 years (12,000 divine years)...
58 KB (6,416 words) - 00:16, 19 May 2024
The citric acid cycle—also known as the Krebs cycle, Szent–Györgyi–Krebs cycle or the TCA cycle (tricarboxylic acid cycle)—is a series of biochemical...
56 KB (6,045 words) - 09:00, 25 April 2024
The solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a nearly periodic 11-year change in the Sun's activity...
89 KB (9,972 words) - 16:32, 18 May 2024
The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH2)2CO from ammonia (NH3). Animals that use...
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The estrous cycle (from Latin oestrus 'frenzy', originally from Ancient Greek οἶστρος (oîstros) 'gadfly') is a set of recurring physiological changes...
28 KB (3,426 words) - 18:26, 29 April 2024
The carbon cycle is that part of the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere...
100 KB (10,174 words) - 05:27, 28 April 2024
The cell cycle, or cell-division cycle, is the series of events that take place in a cell that causes it to divide into two daughter cells. These events...
77 KB (8,991 words) - 15:41, 30 March 2024
The sexagenary cycle, also known as the stems-and-branches or ganzhi (Chinese: 干支), is a cycle of sixty terms, each corresponding to one year, thus a...
80 KB (3,915 words) - 04:35, 13 May 2024
Look up life cycle in Wiktionary, the free dictionary. Life cycle, life-cycle, or lifecycle may refer to: Biological life cycle, the sequence of life stages...
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beats per minute, each cardiac cycle, or heartbeat, takes about 0.8 second to complete the cycle. Duration of the cardiac cycle is inversely proportional to...
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The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency...
20 KB (2,519 words) - 23:08, 17 May 2024
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial...
57 KB (6,199 words) - 23:40, 11 May 2024
Cycling, also known as bicycling or biking, is the activity of riding a bicycle or other type of cycle. It encompasses the use of human-powered vehicles...
87 KB (9,780 words) - 21:34, 13 May 2024
The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle of photosynthesis is...
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A Carnot cycle is an ideal thermodynamic cycle proposed by French physicist Sadi Carnot in 1824 and expanded upon by others in the 1830s and 1840s. By...
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biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle. In each cycle, the chemical element or molecule is transformed and cycled by...
54 KB (5,566 words) - 09:03, 28 January 2024
The Hainish Cycle consists of a number of science fiction novels and stories by Ursula K. Le Guin. It is set in a future history in which civilizations...
26 KB (2,834 words) - 16:23, 6 May 2024
The Brayton cycle, also known as the Joule cycle, is a thermodynamic cycle that describes the operation of certain heat engines that have air or some other...
23 KB (3,030 words) - 11:11, 6 April 2024
The Metonic cycle or enneadecaeteris (from Ancient Greek: ἐννεακαιδεκαετηρίς, from ἐννεακαίδεκα, "nineteen") is a period of almost exactly 19 years after...
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Solar cycle 25 is the current solar cycle, the 25th since 1755, when extensive recording of solar sunspot activity began. It began in December 2019 with...
51 KB (2,837 words) - 22:30, 17 May 2024
Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It is the thermodynamic cycle most...
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The Fenian Cycle (/ˈfiːniən/), Fianna Cycle or Finn Cycle (Irish: an Fhiannaíocht) is a body of early Irish literature focusing on the exploits of the...
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A diurnal cycle (or diel cycle) is any pattern that recurs every 24 hours as a result of one full rotation of the planet Earth around its axis. Earth's...
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A thermodynamic cycle consists of linked sequences of thermodynamic processes that involve transfer of heat and work into and out of the system, while...
18 KB (2,835 words) - 22:51, 3 December 2023
Cycle-ball, also known as "radball" (from German), is a sport similar to association football played on bicycles. The two people on each team ride a fixed...
3 KB (226 words) - 13:12, 19 April 2024
The Ulster Cycle (Irish: an Rúraíocht), formerly known as the Red Branch Cycle, is a body of medieval Irish heroic legends and sagas of the Ulaid. It...
30 KB (3,299 words) - 03:00, 16 May 2024