an imaginary line drawn parallel to the equator, at 23° 28prime; N of the South Pole: between the South Frigid Zone and the South Temperate Zone.
British Dictionary definitions for Antarctic Circle
Antarctic Circle
noun
1.
the imaginary circle around the earth, parallel to the equator, at latitude 66° 32′ S; it marks the southernmost point at which the sun appears above the level of the horizon at the winter solstice
Antarctic Circle in Science
Antarctic Circle
(ānt-ärk'tĭk) The parallel of latitude approximately 66°33' south. It forms the boundary between the South Temperate and South Frigid zones.
Antarctic Circle in Culture
Antarctic Circle definition
An imaginary circle around the Earth about three-quarters of the way from the equator to the South Pole.