| 释义 |
magnetic variation
magnetic variationn.1. Differences in the earth's magnetic field in time and location.2. See magnetic declination.magnetic variation n (General Physics) another name for magnetic declination magnetic variation1. In navigation, at a given place and time, the horizontal angle between the true north and magnetic north measured east or west according to whether magnetic north lies east or west of true north. See also magnetic declination.
2. In cartography, the annual change in direction of the horizontal component of the Earth's magnetic field.Thesaurus| Noun | 1. |  magnetic variation - the angle (at a particular location) between magnetic north and true northmagnetic declination, variationangle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians |
magnetic variation
magnetic variation[mag′ned·ik ‚ver·ē′ā·shən] (geophysics) Small changes in the earth's magnetic field in time and space. magnetic variation In navigation, at a given place and time, the horizontal angle between true north and magnetic north measured in degrees East (+) or West (−) according to whether magnetic north lies east or west of true north. The magnetic variation indicated on a map or a chart is not a fixed quantity but is subject to change. Magnetic variation is indicated by dashed lines on maps and charts. Most maps and charts indicate the rate of annual change of variation also.MedicalSeevariationSee MVAR
See MVARmagnetic variation
Related to magnetic variation: Magnetic deviationSynonyms for magnetic variationnoun the angle (at a particular location) between magnetic north and true northSynonyms- magnetic declination
- variation
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