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

• child's play
• child's room
• child-centered
• child-free
• childbearing
• childbed
• childbed fever
• childbirth
• childbirth-preparation class
• childcare
• Childe Hassam
• childhood
• childish
• childishly
• childishness
• childless
• childlessness
• childlike
• childly
• childminder
• childproof
• chile
• Chile bonito
• Chile hazel
• Chile nut