What is the X in X-mas?
city in Michigan, U.S., from French détroit, literally "straits," from Old French destreit (12c.), from Latin districtum, neuter of districtus. French fort built there 1701. By 1918 the city name was synonymous with "U.S. automobile manufacturing."
Largest city in Michigan.
Note: As the center of automobile production, it is often referred to as the “Motor City” or “Motown.”