释义
n.
the direction of a celestial object from the observer, expressed as the angular distance from the north or south point of the horizon to the point at which a vertical circle passing through the object intersects the horizon
方位；地平经度。
the horizontal angle or direction of a compass bearing
方位角。
词源
"late Middle English （denoting the arc of a celestial circle from the zenith to the horizon）： from Old French
