Definition of Riss in English:

Riss

Syllabification: Riss

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.
  • 1.1The system of deposits laid down during the Riss glaciation.

Origin

early 20th century: from the name of a tributary of the Danube River in Germany.

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