day bed          
noun [ C ] uk/ˈdeɪ ˌbed/ us/ˈdeɪ ˌbed/
 (also daybed)(室内或室外使用的)坐卧两用长沙发,大躺椅,日间床 
a bed inside or outside the house for lying or resting on during the day
  There is a brown velvet daybed in the living room. 客厅里有一张棕色的天鹅绒大躺椅。 
 The hotel rooftop has couches, day beds, a bar and a pool. 酒店天台上有沙发、大躺椅、酒吧和游泳池。 
  (医院的)日间床位
a bed in a hospital for someone having treatment who needs to lie down for a time but does not need to stay for a night
  The new 31,000-square-foot wing will add 20 inpatient beds and 12 day beds. 楼房新翼面积有3万1千平方英尺,将增加20个住院床位和12个日间床位。 
 - More examples
 - She was lounging on the antique daybed in her kimono.
 - Lili found Serge lying on a yellow daybed by the pool.
 - Guests can spend their days in blissful indolence, flitting from day bed to lounger.
 - We have a couple of day beds for patients who need to rest under observation following treatment.
 - The laser treatment is much cheaper than conventional surgery: patients are in and out in half an hour, with no need for day beds.