Pronunciation: (ku-lOO'vē-um), [key]
—pl. -vi•aPronunciation: (-vē-u), [key] -vi•ums. Geol.
loose earth material that has accumulated at the base of a hill, through the action of gravity, as piles of talus, avalanche debris, and sheets of detritus moved by soil creep or frost action.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.