1. An imaginary line connecting points on the Earth's surface where the magnetic declination is the same
   - isogonic line, isogone

Derived forms: isogonal lines

Type of: line

• Sephardic Jew
• sepia
• Sepiidae
• sepiolite
• sepoy
• Sepoy Mutiny
• seppo
• seppuku
• sepsis
• sept
• Sept. 11
• septal
• septal defect
• septate
• septation
• septectomy
• September
• September 11
• September 17
• September 29
• September elm
• September equinox
• septenary
• septennial
• septentrional