the.com/meridian

an imaginary line we drew so confidently the whole world agreed where time begins

means An imaginary great circle or line running from pole to pole, used to mark longitude and divide the day — or, more broadly, the highest point something reaches.

from From Latin meridianus, 'of midday,' from meridies, 'noon' — itself a worn-down form of medidies, 'mid-day' (medius, 'middle,' plus dies, 'day'). The sense of 'noon' carried over because the sun crosses the local meridian line exactly at midday; from that overhead peak comes the figurative 'meridian' meaning the height of one's powers or fortunes.

prime line
Greenwich won the zero meridian by a 1884 vote
french holdout
France used Paris meridian until 1911 out of spite
acupuncture roots
Chinese medicine maps invisible meridians through the body
peak meaning
Latin meridies means midday, the sun's highest point
every spot
You stand on your own unique meridian right now
for instance

prime meridian — 0° longitude line passing through greenwich, england, established 1884 international meridian conference

international date line — roughly 180° meridian in pacific ocean where calendar date changes, established 1884

meridian mississippi — city in lauderdale county, mississippi, population ~10,000

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