sedan

Concise Oxford English Dictionary © 2008 Oxford University Press:
sedan /sɪˈdan/

▶noun

• 1 (also sedan chair) an enclosed chair for conveying one person, carried between horizontal poles by two porters, common in the 17th and 18th centuries.

• 2 chiefly N. Amer. a car for four or more people.

– origin perh. an alt. of an Ital. dial. word, based on L. sella ‘saddle’.