'Cosine galvanometer' definitions:

Definition of 'Cosine galvanometer'

From: GCIDE

Galvanometer \Gal`va*nom"e*ter\, n. [Galvanic + -meter: cf. F. galvanom[`e]tre.] (Elec.) An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle. [1913 Webster]
Differential galvanometer. See under Differental, a.
Sine galvanometer, Cosine galvanometer, {Tangent galvanometer} (Elec.), a galvanometer in which the sine, cosine, or tangent respectively, of the angle through which the needle is deflected, is proportional to the strength of the current passed through the instrument. [1913 Webster]