retropulsion /ret-rō-pulˈshən/

1. Pushing backwards
2. A tendency to fall backwards experienced by some people with Parkinson's disease

• sideswoman
• side table
• side tables
• side tone
• side tones
• sidetrack
• sidetracked
• sidetracking
• sidetracks
• side valve
• side valves
• side view
• side views
• sidewalk
• sidewalks
• sidewall
• sidewalls
• sideward
• sidewards
• sideways
• side-wheel
• side-wheeler
• side-wheelers
• side whiskers
• side wind