azimuth/ˈæzɪməθ; `æzəməθ/ n1 (astronomy 天) arc of the sky from the zenith to the horizon 地平经度（从天顶到地平圈在天空的弧度）.2 (in surveying) angle between this arc and the meridian （测量中）方位角（此弧与子午圈之间的夹角）.
牛津英汉双解词典