Enceladus

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noun En·cel·a·dus \en-ˈse-lə-dəs\

Definition of Enceladus

astronomy

  1. :  the sixth largest satellite of Saturn that has a diameter of approximately 310 miles (500 km) and is characterized by geological activity and the presence of liquid water Images revealed a terrain of faults, folds, and ridges devoid of craters, further evidence that Enceladus is one of the most geologically active places in the solar system. — Ron Cowen, Science News, 6 May 2006

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a rounded knoll or a ridge of ice

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