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 (vâr′ē-ŏm′ĭ-tər, văr′-)
A variable inductor used to measure variations in terrestrial magnetism.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (General Physics) an instrument for measuring variations in a magnetic field, used esp for studying the magnetic field of the earth
2. (Electrical Engineering) electronics a variable inductor consisting of a movable coil mounted inside and connected in series with a fixed coil
3. (Aeronautics) a sensitive rate-of-climb indicator, used mainly in gliders
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌvɛər iˈɒm ɪ tər)

1. a two-coil inductor in which electrical inductance is varied by rotating one coil within the other.
2. an adaptation of this used for detecting changes in the earth's magnetic field.
[1895–1900; vari- (see various) + -o- + -meter]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.variometer - a measuring instrument for measuring variations in a magnetic fieldvariometer - a measuring instrument for measuring variations in a magnetic field
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
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References in periodicals archive ?
An important aspect of real-world deployment of variometers is the anthropogenous noise at the selected site, which is at least in the Central European region difficult to obey by placing the instrument in a remote locality--due to extensive urban development, DC-railways, pipelines, etc.
Marusenkov, "Possibilities of further improvement of 1 s fluxgate variometers," Geoscientific Instrumentation, Methods and Data Systems, vol.
To achieve the best magnetometer (variometer) performance, it will usually be installed in a temperature-stabilized environment, either by the use of an active and magnetically clean heating-system or by selecting a highly temperature-stable location, preferably underground.
The new sensor's altitude resolution of up to 20 cm makes it ideal for use in altimeters and variometers. Measuring only 6.4 mm x 4.0 mm x 2.75 mm, the MS5806 easily fits in space-constrained devices including high-end thin watches, adventure and multi-mode watches, fitness gadgets, mobile altimeter/barometer systems, and bike computers.
Since the three-component magnetic variometer can not be considered as a point-source instrument at a distance of 1 meter (three sensors located along a straight line, at a distance of 16 cm), the numeric value (module of vector) of magnetic induction in the coil with current could be calculated only approximately, based on the data from three variometers.
Because it is easy to build, amateurs can use home-made variometers for studying divergences in the local magnetic field and detecting auroral conditions--for example, the jamjar magnetometer, described in the Journal by Livesey.
For those who wish to build their own magnetic storm detector, there are two popular designs--the variometer and the fluxgate --which are sensitive enough to detect storm-induced changes in the Earth's magnetic field, and technologically within reach of the amateur observer.
The term variometer is generally applied to any instrument that registers magnetic variations, whether it be changes in magnetic declination or any other component of the field, horizontal or vertical.