Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A line on a map connecting points of equal magnetic declination.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun cartography, navigation A line on a chart or map showing points of constant
magnetic declination .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an imaginary line connecting points on the Earth's surface where the magnetic declination is the same
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
isogonic + line
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