as·tro·labe
noun/ˈæstrəleɪb/
/ˈæstrəleɪb/
(astronomy)- a device used in the past for measuring the distances of stars, planets etc. and for calculating the position of a ship
星盘，等高仪（旧时用于测量天体距离或计算船只位置） Word Originlate Middle English: from Old French astrelabe, from medieval Latin astrolabium, from Greek astrolabon, neuter of astrolabos ‘star-taking’.