reclinant
/riˈklīnāt/Definitions
1. verb
to lean back, as on a couch or chair, so as to rest the body partly on the back or on the back of the chair
“She reclined in her favorite armchair to read a book.”
2. noun
a reclining position, especially one in which the body is partly supported by a couch or chair
“The reclinate of the sofa allowed her to watch TV comfortably.”