Meridian
/məˈrɪdiən/
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Definition
(noun) In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface.
Sentence Examples
Japan is on the 135th meridian East.
The moon does not cross the meridian today.
CEFR Practice Quiz
The Prime ____ passes through Greenwich, England, and serves as the starting point for measuring longitude.