An Etymological Dictionary of the German Language, G (1891)
by Friedrich Kluge, translated by John Francis Davis
Groppe
Friedrich Kluge2506970An Etymological Dictionary of the German Language, G — Groppe1891John Francis Davis

Groppe, m. and f., ‘miller's thumb,’ from the equiv. MidHG. groppe; akin to MidLat. carabus?.