• 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...
    5 KB (580 words) - 15:49, 14 March 2024
  • Thumbnail for Water cycle
    The water cycle (or hydrologic cycle or hydrological cycle), is a biogeochemical cycle that involves the continuous movement of water on, above and below...
    37 KB (4,699 words) - 17:18, 9 September 2024
  • Thumbnail for Menstrual cycle
    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...
    52 KB (6,279 words) - 14:22, 9 October 2024
  • Thumbnail for Solar cycle
    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 (10,014 words) - 10:42, 21 September 2024
  • Thumbnail for Citric acid cycle
    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 (6,065 words) - 19:58, 9 October 2024
  • Thumbnail for Cell cycle
    The cell cycle, or cell-division cycle, is the sequential series of events that take place in a cell that causes it to divide into two daughter cells...
    78 KB (9,091 words) - 19:45, 9 October 2024
  • 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) - 18:44, 27 August 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...
    21 KB (2,219 words) - 13:28, 25 July 2024
  • Thumbnail for Calvin cycle
    The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle of photosynthesis is...
    23 KB (2,772 words) - 15:08, 23 September 2024
  • Thumbnail for Instruction cycle
    The instruction cycle (also known as the fetch–decode–execute cycle, or simply the fetch–execute cycle) is the cycle that the central processing unit (CPU)...
    9 KB (1,182 words) - 04:24, 2 October 2024