Quiz: Remember the definition of mal de mer?
chair on wheels intended for use by ladies and invalids. It was devised by James Heath, of Bath, Eng., about 1750. For the next three-quarters of a century it rivaled the sedan chair and ultimately superseded it as a form of conveyance in Great Britain. The most common variety was supported on two wheels joined by an axle beneath the seat, with a small pivoting wheel in front supporting the footrest.