A line (imaginary or on a map) connecting points at which a particular event occurs or occurred at the same time.
| 单词 | θ7351 |
| 释义 | the world > the earth > earth sciences > geography > map-making > map > [noun] > line on map > simultaneous events (1) isochron1881 A line (imaginary or on a map) connecting points at which a particular event occurs or occurred at the same time. |
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