To save this word, you'll need to log in.
Definition of isogonic line
: an imaginary line or a line on a map joining points on the earth's surface at which the magnetic declination is the same
— called also isogonal
Keep scrolling for more
Comments on isogonic line
What made you want to look up isogonic line? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
May 2020 Words of the Day Quiz
- Which is a synonym of exiguous?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share isogonic line
Time Traveler for isogonic line
The first known use of isogonic line was circa 1859
See more words from the same year