1) Presidersoffer 1) Chair 2) Chinese invention 
A wheelchair is a chair with wheels, invented in the early 5th century. The device comes in variations where it is propelled by motors or by the seated occupant turning the rear wheels by hand. Often there are handles behind the seat for someone else to do the pushing. Wheelchairs are used by people for whom walking is difficult or impossible due ...
Mobility aid, designed for and used by individuals with mobility impairments; may be manually operated or motorized.
(hwēl´chār) a means of locomotion for non-ambulatory individuals, consisting of a seat on a platform with wheels, which provides comfortable, safe sitting, and a steering mechanism. The disabled person should be evaluated by a physiatrist, physical therapist, or occupational therapist with the assistance...
[n] - a movable chair mounted on large wheels
noun a movable chair mounted on large wheels; for invalids or those who cannot walk; frequently propelled by the occupant