noun
water cycle; hydrologic cycle
Scientific term for the continuous movement of water on, above, and below the surface of the Earth.
水循環は、地球上の水が蒸発し、雲になり、雨として降る過程です。
The water cycle is the process in which water on Earth evaporates, becomes clouds, and falls as rain.
Compound of 水 (water) and 循環 (circulation, cycle).