noun
: a portable instrument consisting of a small telescope, a 60-degree prism, and a mercury reflecting basin by which determinations of time, latitude, and azimuth may be obtained from star observations
noun
: a portable instrument consisting of a small telescope, a 60-degree prism, and a mercury reflecting basin by which determinations of time, latitude, and azimuth may be obtained from star observations
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012