ADUACA, (Antonine;) or ATUACA, contracted from Atuacua, (Cæsar;) anciently a large and famous city of the Tungri; now a small and inconsiderable village, called Tongerem, in the bishoprick of Liege, to the north-west of the city of Liege, in the territory of Haspengow, on the rivulet Jecker, that soon after falls into the Maese. E. Long. 5. 22. Lat. 50. 54.