- any of various devices designed to measure or record small variations in some quantity, as air pressure
- a geophysical instrument for measuring magnetic forces or determining variations of magnetic force, esp. at different places on the planet earth
- Electronics a continuously variable inductor consisting of a coil mounted within and in series with a fixed coil, with the inner coil capable of rotation so as to vary the total inductance
Origin of variometervario(us) + -meter
A variable inductor used to measure variations in terrestrial magnetism.