cwm

[koom] /kum/
noun
1.
cirque (def 1).
Origin of cwm
1850-55; < Welsh: valley. See combe
British Dictionary definitions for cwm

cwm

/kuːm/
noun
1.
(in Wales) a valley
2.
(geology) another name for cirque (sense 1)
Word Origin and History for cwm
n.

1853, from Welsh cwm "coomb" (see coomb).

cwm in Science
cwm
  (km)   
See cirque.