backrest

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++back·rest /ˈbækrest/ noun [countable]  the part of a chair or seat that supports your back 〔座椅的〕靠背

Examples from the Corpus

backrest• This time we had the welcome addition of a sheepskin backrest, an inflatable neck support and a selection of surgical collars.

back·rest nounChineseSyllable  

seat Corpus part chair the of that supports or a

backrest
back‧rest /ˈbækrest/ noun [countable]
the part of a chair or seat that supports your back

back·restBrE /ˈbækrest/ 🔊NAmE /ˈbækrest/ 🔊 nounpart of a seat that supports sb's back 靠背