(Greek > Latin: north, northern)

Aurora Borealis, Aurorae Borealis, northern lights
An aurora, or northern dawn, that occurs in the northern regions, or the North Pole, of the earth.
circumboreal (adjective), more circumboreal, most circumboreal
Relating to the distribution of or occurring primarily around the boreal regions of North America and Eurasia; a special reference to plants.
Disease arising from the consumption of too much food.
In Greek mythology, a group of people who the ancient Greeks believed lived in a warm and sunny land north of the source of the north wind.
subboreal (adjective), more subboreal, most subboreal
1. Extremely cold, a biogeographic zone in which the climatic condition approaches that of the north but with lower temperatures.

A reference to a region that has a northern climate, with colder winters.

2. Etymology: from Latin borealis, which came from boreas, "north wind"; from Greek Boreas, "god of the north wind".