Riss
/rɪs/noun
usu. as modifier
1- Geology the penultimate Pleistocene glaciation in the Alps, possibly corresponding to the Saale of northern Europe【地质】里斯冰期（阿尔卑斯地区倒数第二个更新世冰蚀, 可能与北欧的萨勒冰期相当）。
1.1
- the system of deposits laid down at this time里斯冰期沉积（物）系。
词源
early 20th cent.: from the name of a tributary of the River Danube in Germany.