Definition that contains line of latitude
- polar circle a line of latitude at the north or south poles
- tropic of cancer a line of latitude about 23 degrees to the north of the equator
- antarctic circle a line of latitude north of the south pole
- tropic of capricorn a line of latitude about 23 degrees to the south of the equator
- arctic circle a line of latitude near but to the south of the north pole; it marks the northernmost point at which the sun is visible on the northern winter solstice and the southernmost point at which the midnight sun can be seen on the northern summer solstice