| 释义 |
me·rid·i·an AHD[mə-rĭdʹē-ən] D.J.[məˈrɪdiːən]K.K.[məˈrɪdiən]n.（名词）abbr. m., M., mer.【缩写】 Jerry Malone- An imaginary great circle on the earth's surface passing through the North and South geographic poles. All points on the same meridian have the same longitude.过两极的大圆：一个通过地球表面南北两极的假想线圈。同一子午线上的所有点都具有相同的经度
- Either half of such a great circle from pole to pole.子午线：从极点到极点的大线圈的一半
- Astronomy A great circle passing through the two poles of the celestial sphere and the zenith of a given observer.【天文学】 天体的经线：通过天体上两极和一假定观测物天顶的大圈
- Mathematics 【数学】
- A curve on a surface of revolution, formed by the intersection of the surface with a plane containing the axis of revolution.回转面曲线：回转面与通过旋转轴的平面相交而形成的位于回转面上的曲线
- A plane section of a surface of revolution containing the axis of revolution.切平面：通过旋转轴回转面的部分平面
- Any of the longitudinal lines or pathways on the body along which the acupuncture points are distributed.经脉；经络：任一分布在身体上针炙点所呈现的纵向线或轨迹
- Archaic 【古语】
- The highest point in the sky reached by the sun or another celestial body; a zenith.天顶：太阳或别的天体在天空中所达到的最高点；天顶
- Noon.正午
- The highest point or stage of development; peak:鼎盛，颠峰：发展的最高点或最高阶段；顶峰："Men come to their meridian at various periods of their lives"(John Henry Newman)“男人在其一生中达到全盛时期的时间是不同的”(约翰·亨利·纽曼)
- Upper Midwest See median strip See Regional Note at neutral ground 【中西部偏北】 参见 median strip 参见 neutral ground
adj.（形容词）- Of or relating to a meridian; meridional.经线的，子午线的：子午线的或与子午线有关的；经线的
- Of or at midday:正午的或在正午的：the meridian hour.正午时刻
- Of, relating to, or constituting the highest point, as of development or power:顶点的：顶点的、与顶点有关的或构成顶点的，如发展或权力：the empire in its meridian period.处于全盛时期的帝国
- Middle English 中古英语
- from Old French [midday] 源自 古法语 [正午]
- from Latin merīdiānus [of midday] 源自 拉丁语 merīdiānus [正午的]
- from merīdiēs [midday] 源自 merīdiēs [正午]
- from merīdiē [at midday] 源自 merīdiē [在正午]
- from Old Latin *mediei diē 源自 古拉丁语 *mediei diē
- *mediei [dative (locative) of] medius [middle] * see medhyo- *mediei medius的与格（位置格） [中间的] * 参见 medhyo-
- diē [dative of] diēs [day] * see deiw- diē diēs的与格 [白天] * 参见 deiw-
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