declinator

Century Dictionary and Cyclopedia

1. n. An instrument used in ascertaining the declination, as in dialing, of a plane, and in astronomy, of the stars. Also declinatory.
2. n. One who declines to join or agree with another; a dissentient.

Wiktionary

1. n. An instrument for taking the declination or angle which a plane makes with the horizontal plane.
2. n. obsolete A dissenter.

GNU Webster's 1913

1. n. An instrument for taking the declination or angle which a plane makes with the horizontal plane.
2. n. rare A dissentient.