Definition of "lutetian" []

• Relating or pertaining to ancient Lutetia in Gaul, or poetically to Paris in France, its modern representative; Parisian.
• In geology, the Middle Eocene Tertiary of the Paris basin, which takes its name from Lutetia, the Roman name of Paris. This stage is regarded as the probable equivalent of the Lower Bagshot and Brackle-sham beds of England. (noun)

The Century Dictionary (Public Domain)