Definition of Riss–Würm in US English:

Riss–Würm

adjective

Geology
  • Designating the interglacial period between the Riss and Würm glaciations; of or relating to this period.

noun

Geology
  • The Riss–Würm interglacial period.

Origin

Early 20th century; earliest use found in American Anthropologist. From Riss + Würm, after German Riss-Würm (A. Penck, 1902 or earlier).

Pronunciation

Riss–Würm

/ˌrɪsˈvʊəm/