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词汇 prime vertical transit instrument
释义

Definition of prime vertical transit instrument in English:

prime vertical transit instrument

(also prime vertical transit, prime vertical instrument)
noun
Astronomy
  • A transit instrument incorporating a telescope which revolves in the plane of the prime vertical circle, used for timing the passage of a celestial object across this circle.

Origin

Mid 19th century; earliest use found in United States Magazine and Democratic Review.

Definition of prime vertical transit instrument in US English:

prime vertical transit instrument

(also prime vertical transit, prime vertical instrument)
noun
Astronomy
  • A transit instrument incorporating a telescope which revolves in the plane of the prime vertical circle, used for timing the passage of a celestial object across this circle.

Origin

Mid 19th century; earliest use found in United States Magazine and Democratic Review.

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