transit instrument

noun

Definition of transit instrument

1 : a telescope that is mounted at right angles to a horizontal east-west axis on which it revolves with its line of collimation in the plane of the meridian and that is used in connection with a clock and chronograph for observing the time of transit of a celestial body over the meridian of a place

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Cite this Entry

“Transit instrument.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/transit%20instrument. Accessed 27 Sep. 2021.

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