polar circle

polar circle — n. 1. ARCTIC CIRCLE 2. ANTARCTIC CIRCLE …   English World dictionary

Polar circle — The polar circle in Finland, 1975 …   Wikipedia

polar circle — noun a line of latitude at the north or south poles • Hypernyms: ↑latitude, ↑line of latitude, ↑parallel of latitude, ↑parallel • Instance Hyponyms: ↑Antarctic Circle, ↑Arctic Circle * * * noun …   Useful english dictionary

polar circle — either the Arctic or the Antarctic Circle. [1545 55] * * * …   Universalium

polar circle — po′lar cir′cle n. geo either the Arctic or the Antarctic Circle • Etymology: 1545–55 …   From formal English to slang

polar circle — noun Date: 1551 either of the two parallels of latitude each at a distance from a pole of the earth equal to about 23 degrees 27 minutes …   New Collegiate Dictionary

Polar circle marathon — The Polar Circle Marathon is a classical 42.195 km marathon, which however has the very untraditional feature that it is situated on 66 degrees northern latitude also known as the polar circle. This means that the temperatures are relatively low… …   Wikipedia

Polar ecology — is the relationship between plants and animals in a polar environment. Polar environments are in the Arctic and Antarctic regions. Arctic regions are in the northern hemisphere, and it contains land and the islands that surround it. Antarctic is… …   Wikipedia

Polar night — Typical blue twilight experienced during the polar night in Longyearbyen, Svalbard located at 78 degrees north. The polar night occurs when the night lasts for more than 24 hours. This occurs only inside the polar circles. The opposite… …   Wikipedia

circle — n. circular geometric figure 1) to describe, draw a circle 2) to square a circle (to square a circle is impossible) 3) the Antarctic; Arctic; polar circle (at the Arctic circle) 4) the great circle (on the earth s surface) 5) a traffic circle… …   Combinatory dictionary

polar — 1 adj. a of or near a pole of the earth or a celestial body, or of the celestial sphere. b (of a species or variety) living in the north polar region. 2 having magnetic polarity. 3 a (of a molecule) having a positive charge at one end and a… …   Useful english dictionary