Fromribbon +‎back.

ribbonback (pluralribbonbacks)

1. (oftenattributive) Adecorativechairback made with slender rails of wood.
   • 1982, Marjorie Eatock,Stolen Holiday, page120:

     No overstuffed chairs here; just slender, carved legs, and curved arms,ribbonbacks and French satin cushions.

2. A chair having this kind of back.
   • 1940, Clifford Hornby,Shooting Without Stars, page110:

     We sat in our Chippendaleribbonbacks, sipping green tea and goats' milk, with Osborne biscuits in the saucer.