Ferris wheel

n.

An amusement ride consisting of a large upright rotating wheel having suspended seats that remain in a horizontal position as the wheel revolves.

After George Washington Gale Ferris (1859-1896), American engineer.

Recent large Ferris wheels have been marketed as observation wheels.

wheelchair

n.

A movable chair mounted on large wheels for invalids or those who cannot walk. It is frequently propelled by the occupant.

Also wheel chair.