transit instrument   (TTS Sound)

The transit_instrument has 1 Senses.

• transit instrument
• 子午儀
• a telescope mounted on an axis running east and west and used to time the transit of a celestial body across the meridian
• 東西の軸の上に載せられた望遠鏡で、天体が子午線を横切る時刻を測定するのに使われる