cornice
cornice
/ˈkɔːnɪs/
(architecture)
a border around the top of the walls in a room or on the outside walls of a building
Word Origin
mid 16th cent.: from French corniche, from Italian cornice, perhaps from Latin cornix ‘crow’ (compare with corbel), but influenced by Greek korōnis ‘coping stone’.
e.g.
Snow cornices are overhanging ledges of snow formed by wind blowing and depositing snow over sharp terrain breaks. 風によって雪がひさし状に成長したもの (/yupeco/『ゴールデンカムイ』6話)