Definition from Wiktionary, the free dictionary
isogon (plural isogons)
- (mathematics) An equiangular polygon.
- (cartography, meteorology) A line of equal or constant wind direction on a graph or chart, such as a weather map.
- (cartography, navigation) A line of equal or constant magnetic declination on a chart; an isogonic line.
a line of constant or equal wind direction
a line of constant or equal magnetic declination