- mountaineering an isolated rock outcrop on a glacier
C20: literally: kidney
Examples from the Web for rognon
The name of the Chef Rtisseur, curiously enough, was Rognon.Belgium
George W. T. (George William Thomson) Omond
Across this portion of the glacier we proceeded westward, purposing to attempt the ascent at the Rognon side.Hours of Exercise in the Alps
Among its more important affluents are, on the right the Rognon, and on the left the Blaise.