Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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cycle rickshaw a type of transportation originating in Asia, having three wheels and two passenger seats, and powered by a person pedaling; pedicab; bicycle rickshaw.
estrous cycle the cycle of chemical and physiological changes in female mammals from one period of estrus and ovulation to the next.
food cycle the interconnected food chains in a community.
life cycle the continuous changes undergone by an organism in its development from its earliest stage until it is able to reproduce. [2 definitions]
nitrogen cycle the continuous natural cycle by which nitrogen passes from air to soil to organisms and back to air.
Rankine-cycle engine a type of steam engine in which the water that is evaporated into steam is condensed and recycled, developed experimentally as a pollution-reducing alternative to the internal combustion engine.
solar cycle an eleven-year cycle of recurring sunspots and other solar phenomena.
water cycle the process by which water on the earth evaporates, then condenses in the atmosphere, and then returns to earth in the form of precipitation.