详细解释:n. 六分仪
英语解释：
名词 sextant:
a unit of angular distance equal to 60 degreesa measuring instrument for measuring the angular distance between celestial objects; resembles an octant例句：
A medieval instrument, now replaced by the sextant, that was once used to determine the altitude of the sun or other celestial bodies.星盘一种中世纪的仪器，曾用来测量太阳或其它天体的高度，现在已被六分仪取代