- an astronomical instrument, mounted on an E-W axis, in which the reticle of a telescope is always in the plane of the meridian. It is used to time the transit of a star, etc, across the meridian
| 单词 | transit instrument |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 tran′sit in′strument,
Collins Concise English Dictionary © HarperCollins Publishers:: transit instrument n
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