D defs.my
Entry 1 sense Webster, 1913

Declinometer

· Dec·li·nom·e·ter · IPA /ˌdɛklɪˈnɒmətə(ɹ)/
01 n. An instrument for measuring the declination of the magnetic needle.
  1. 1.
    An instrument for measuring the declination of the magnetic needle.(Physics)