in·cli·nom·e·ter 
(ĭn′klə-nŏmĭ-tər)
(ĭn′klə-nŏmĭ-tər)n.
1. An instrument used to determine the angle of the earth's magnetic field in respect to the horizontal plane.
2. An instrument for showing the inclination of an aircraft or ship relative to the horizontal.
3. See clinometer.