Word Study
gunter's quadrant
CIDE DICTIONARY
gunter's quadrant,
A thin quadrant, made of brass, wood, etc., showing a stereographic projection on the plane of the equator. By it are found the hour of the day, the sun's azimuth, the altitude of objects in degrees, etc. See Gunter's scale. [1913 Webster]
For further exploring for "gunter's quadrant" in Webster Dictionary Online