Lewis & Short

ăquĭlōnāris, e, adj. [aquilo.].

  1. I. Northerly, northern: regio tum aquilonaris, tum australis, Cic. N. D. 2, 19, 50 (but v. aquilonius).
  2. II. Piscis aquilonaris, a constellation, the Northern Fish, Vitr. 9, 6; cf. Cic. Fragm. ix. 2, p. 580 Orell.