from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Pertaining to the north; northern.
from The Century Dictionary and Cyclopedia
- Northern; boreal; hyperborean.
From Latin septentrionalis, from septentriones ("seven ploughoxen"), a name for the constellations now known as Ursus Major and Ursus Minor, which appear in the northern sky. (Wiktionary)