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单词
meridian circle
释义
WordReference Random House Unabridged Dictionary of American English © 2024
merid
′
ian cir′cle,
[
Astron.
]
Astronomy
a transit instrument provided with a graduated vertical scale, used to measure the declinations of heavenly bodies and to determine the time of meridian transits. Also called
circle, transit circle, transit instrument.
1540–50
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更新时间:2024/11/10 19:41:07