释义
n.
a circle of constant longitude passing through a given place on the earth's surface and the terrestrial poles
（地球的）子午线，经线。
【天文】 （天体的）子午线，经线。
(in acupuncture and Chinese medicine)each of a set of pathways in the body along which vital energy is said to flow. There are twelve such pathways associated with specific organs.
（针灸及中医用语）经脉。
adj.
relating to or situated at a meridian
（与）子午线（有关）的，（与）经线（有关）的；在子午线的
-
the meridian moon. 中天明月。
词源
"late Middle English： from Old French