n a smooth prominence of the frontal bone between and above the eyebrows; the most forward projecting point of the forehead in the midline at the level of the supraorbital ridges
n the condition of being covered with glaciers or masses of ice; the result of glacial action
Agassiz recognized marks of glaciation all over northern Europe
n the process of covering the earth with glaciers or masses of ice
n tall coarse American herb having palmate leaves and numerous small white dioecious flowers; found wild in most alluvial soils of eastern and central United States