What is northern; pertaining to the north, or to the north wind; as, a boreal bird; a boreal blast. So from their own clear north in radiant streams, Bright over Europe bursts the boreal morn. Thomson called?

boreal — Northern; pertaining to the north, or to the north wind; as, a boreal bird; a boreal blast. So from their own clear north in radiant streams, Bright over Europe bursts the boreal morn. Thomson. (Webster's 1913.)