line of longitude

1. Prime meridian ( line of longitude which passes through Greenwich near London, numbered zero, from which the other lines of longitude are calculated)
   本初子午线（通过伦敦附近之格林尼治的经线，度数为零，是计算东西经度的起点）。
2. As the shear line moves southward, there is moving southward of clockwise circulation cell associated with the moving southward of subtropical jet on the longitude cross-section of vertical circulation through the shear line.
   横切变线南移，在穿过切变线的经圈垂直环流上表现出有一个顺时针向环流随副热带急流的南移而南移。
3. After the occurrence of flares either the arrangement of magnetic polarity or the neutral line of the longitude field tends to a relatively stable state.
   在耀斑爆发后，无论是磁极性排列和纵场中性线都趋于相对稳定状态。
4. With the electro-hydraulic proportional directional restricting flowing valve, pressure-reducing valve, DC line speed measuring sensor etc, the electro-hydraulic proportional closed loop speed control system is designed, and the speed of the longitude feeding equipments of Tin earphone can be controlled.
   采用用电液比例方向节流阀、减压阀、直流直线测速传感器等元件设计了电液比例闭环速度控制系统，对铣耳机纵向进给装置的速度进行控制。

noun

1. an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
   1. all points on the same meridian have the same longitude

   Synonym:    meridian