A wheelchair is a mobilized form of chair using 2 or more wheels, a footrest and armrest usually cushioned. It is used when walking is difficult or impossible to do due to illnesses, injury, disabilities, or age related health conditions.
A wheelchair on the street
Depiction of Chinese philosopher Confucius in a wheelchair, dating to c. 1680.
Nicolas Grollier de Servière (1596–1689) Wheelchair in his Cabinet of curiosities
Amputee in a 19th-century wheelchair
A chair is a type of seat, typically designed for one person and consisting of one or more legs, a flat or slightly angled seat and a back-rest. It may be made of wood, metal, or synthetic materials, and may be padded or upholstered in various colors and fabrics.
Chair, c. 1772, mahogany, covered in modern red morocco leather, height: 97.2 cm, Metropolitan Museum of Art (New York City)
The Coronation Chair, c. 1300
The Monobloc chair is a lightweight stackable polypropylene chair, usually white in colour, often described as the world's most common plastic chair.
Metal chairs in the Tuileries Garden, Paris, France