bed + jacket
bedjacket (plural bedjackets)
- A short jacket worn when sitting up in bed, usually by women
- 1944, Emily Carr, The House of All Sorts, "Sham," 
- She hauled the bed from her room out into the middle of the Studio before the open fire and lay there in state, done up in fancy bed-jackets, smoking innumerable cigarettes and entertaining anybody whom she could persuade to visit.
a short jacket worn when sitting up in bed