1 historical Of, relating to, or characteristic of the Roman province of Aquitania, or the historic province or kingdom of Aquitaine. Also occasionally: of or relating to the region of Aquitaine in modern France.
Designating the earliest stage of the Miocene epoch, between 23.03 and 20.43 million years ago; of, relating to, or dating from this stage.
The Aquitanian stage was formerly considered by some geologists to be the uppermost or final stage of the Oligocene epoch.
1 historical A native or inhabitant of the Roman province of Aquitania, or the historic province or kingdom of Aquitaine; (also) the language formerly spoken in this region, thought to be related to Basque. Also occasionally: a native or inhabitant of the region of Aquitaine in modern France.
With the: the Aquitanian stage, or the series of rocks dating from this time.
Early 17th century; earliest use found in William Slatyer (c1587–1647), Church of England clergyman and author. Partly from Aquitania (classical Latin Aquītānia), the name of a province of Roman Gaul (from classical Latin Aquītānī, the name of the Gaulish inhabitants of this region + -ia) + -an, and partly from Aquitaine (French Aquitaine), the later name of this region (corresponding to an area in the south-west of present-day France) + -ian.