noun, noun or participle which takes 'suru', intransitive verb
culmination; crossing the meridian
Astronomical term for a celestial body reaching its highest point in the sky, crossing the observer's meridian. Used in technical and educational contexts.
今夜、月は午後10時に南中する。
Tonight, the moon will cross the meridian at 10 p.m.
太陽の南中高度は季節によって変わる。
The sun's altitude at culmination changes with the seasons.