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

• furring strip
• furrow
• furrowed
• furry
• furry tongue
• further
• further education
• furtherance
• furthermore
• furthermost
• furthest
• furtive
• furtively
• furtiveness
• furuncle
• furunculosis
• fury
• furze
• fusain
• Fusanus
• Fusanus acuminatus
• liar
• Lias
• Liatris
• Liatris punctata