noun
: a mass of rock fragments that moves or has moved slowly down a slope under its own weight usually aided by frost action and sometimes by interstitial ice — compare rock glacier , rock river
noun
: a mass of rock fragments that moves or has moved slowly down a slope under its own weight usually aided by frost action and sometimes by interstitial ice — compare rock glacier , rock river
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012