俯ふ仰ぎょう角かく

noun

angle of elevation

Technical term used in fields such as surveying, ballistics, and astronomy to describe the vertical angle between a reference plane and a line of sight.

• 測そく量りょう士しは俯ふ仰ぎょう角かくを正せい確かくに測そく定ていした。

  The surveyor accurately measured the angle of elevation.