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menstrual cycle
The recurring cycle of physiological changes in the uninseminated females of some animal species that is associated with reproductive fertility; especially the cycle in a human woman.
sulfur cycle
(chemistry, biochemistry) the natural cycle which includes the mineralization of organic sulfur to sulfide, oxidation of this to sulfate, and reduction of this to sulfide followed by microbial incorporation of this into organic compounds
cycle paths
plural of cycle path
hydrolic cycles
plural of hydrolic cycle
cycle shorts
operating cycles
plural of operating cycle
ovarian cycles
plural of ovarian cycle
news cycles
plural of news cycle
solar cycles
plural of solar cycle
solar cycle
(astronomy) The nearly periodic 11-year change in the Sun's activity, measured from a minimum of activity to the next.