swing-wing 
noun [usually as modifier]
An aircraft wing that can move from a right-angled to a swept-back position: swing-wing fighter bombers...
- This swing-wing bomber's official name was Lancer, but its crews called it the ‘Bone’.
- The two-seat SLR has the swing-wing doors and the futuristic interior is beautified by red leather seats and chromed panels on the dashboard.
- The swing-wing design also allows slow flight with the wings fully extended to increase lift.
- Staffordshire bull terrier
- staffroom
- Staffs.
- staff sergeant
- staff weapon
- stag
- stag beetle
- stage
- stageability
- stageable
- stagecoach
- stagecraft
- stage direction
- stage-dive
- stage-diver
- stage-diving
- stage door
- stage effect
- stage fright
- stagehand
- stage left (or right)
- stage-manage
- stage management
- stage manager
- stage name