meridian
特殊用法ante meridian1.■下子午圈, 正午以前时期arbitrary axis meridian1.■任意轴子午线astronomical meridian1.■天文子午线celestial meridian1.■天体子午线central meridian1.■中央子午线ephemeris meridian1.■历书子午线fictitious [virtual] meridian1.■虚子午线first [prime] meridian1.■格林威治子午线, 本初子午线geodetic meridian1.■大地子午线geographic meridian1.■地理子午圈Greenwich meridian1.■格林威治子午线gyro meridian1.■陀螺仪子午线magnetic meridian1.■磁子午圈mean meridian1.■平均子午线observer's meridian1.■测者子午圈oblique meridian1.■斜轴投影经线prime meridian1.■本初子午线, 基准子午圈prime transverse meridian1.■本初横子午线principal meridian1.■主子午线reference meridian1.■基准子午线secondary meridian1.■副子午线standard meridian1.■标准经线[子午线]terrestrial meridian1.■天文子午线true meridian1.■真子午线zero meridian1.■起点子午圈