in Ancient Geography, one of the three principal divisions of Gallia Comata (Caesar); bounded by the Garonne, the Pyrenees, and the ocean: this is the Aquitania Caesariana, or Vetus. Augustus set the different boundaries, viz. the Loire, the Cevennes, the Pyrenees, and the ocean (Strabo). It was called Galla Aquitanica (Pliny); and in the old Notitia, Provincia Aquitanica. The people are called Aquitani (Cæsar). Now comprising Guerme (which seems to be a corruption of Aquitania) and Galcony. AR, in Ancient Geography, the metropolis of Moab, in Arabia Petraea (Moles); and the royal residence, situated on the east side of the river Arnon. It was called also Rabba (Jofhura); and to distinguish it from Rabba of the Ammonites, Rabbat Moab, and on coins Rabbaib Moma (Reland). Eusebius says it was called Areopolis in his time, from AR and Polis. The inhabitants are called Areopolis. St Jerome says that this city was entirely destroyed by an earthquake when he was a young man.

ARA THURIBULI, the altar of incense, in Astronomy, a southern constellation, not visible in our hemisphere, consisting, according to Ptolemy, of seven stars; and according to Sharp's Catalogue, annexed to that of Mr Flamsted, of nine stars.