backrest
noun/ˈbækˌɹɛst/
Etymology Compound of back + rest.
1
The back piece of a chair, used to support the sitter's back.
- I can identify the pattern of wood grain on my chair at Mom and Dad's kitchen table, but I don't try to sketch it in my mind. For me, chairness is nonvisual; it's the feel of a seat connected to four legs and a backrest.2011, Thad Nodine, chapter 3, in Touch and Go: A Novel, [Lakewood, Colo.]: Unbridled Books, →ISBN, page 39:
2
A guide attached to the slide rest of a lathe, and placed in contact with the work to steady it in turning.