Noun: polar circle 'pow-lu(r) 'sur-kul
- Either of two parallels of latitude (the Arctic Circle or Antarctic Circle) marking the limits of the regions where the sun does not set on the summer solstice or rise on the winter solstice
"The Arctic Circle is the northern polar circle"
Derived forms: polar circles
Type of: latitude, line of latitude, parallel, parallel of latitude
Encyclopedia: Polar circle