declinometer

[ dek-luh-nom-i-ter ]
/ ˌdɛk ləˈnɒm ɪ tər /

noun

an instrument for measuring magnetic declination.

Origin of declinometer

1855–60; declin(ation) + -o- + -meter

British Dictionary definitions for declinometer

declinometer
/ (ˌdɛklɪˈnɒmɪtə) /

noun

an instrument for measuring magnetic declination