经线，纬线，经纬度地图或地球仪上的经纬线或经纬度 A degree or circle of longitude or latitude drawn on a map or globe.
纬线，纬度圈与赤道平面平行且环绕地球用来表明纬度高低的许多假想线中的任意一条 Any of the imaginary lines representing degrees of latitude that encircle the earth parallel to the plane of the equator.
（天球的）回归线代表太阳经过的最北视界线与最南视界线的两条相应的天球纬线 Either of two corresponding parallels of celestial latitude that are the limits of the apparent northern and southern passages of the sun.