roundback en · ADJ
Etymology
From round + back.
Meanings
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(not-comparable) Of furniture: having a curved back.
On his right and left are the guests of honor Ying Boujue and Xie Xida, and opposite him is Han Daoguo, the manager of his silk shop. The guests all sit on roundback chairs with no footstools.
2001, Sarah Handler, Austere Luminosity of Chinese Classical Furniture, page 192: