ADUACA, or ADUACA, anciently a large and famous city of the Tungri; now a small and inconsiderable village, called Tongeren, in the bishopric 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. 52. N. Lat. 50. 54.