noun[usually as modifier] Geology
- 1The penultimate Pleistocene glaciation in the Alps, possibly corresponding to the Saale of northern Europe.More example sentences
- Gunz, Mindel, Riss and Wurm are the names of four ice ages.
early 20th century: from the name of a tributary of the River Danube in Germany.
More definitions of RissDefinition of Riss in:
- The US English dictionary