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

Derived forms: isogones

Type of: line

• unfulfilled
• unfunctional
• unfunded
• unfunny
• unfurl
• unfurnished
• unfurrowed
• ungainliness
• ungainly
• ungallant
• ungarbed
• ungarmented
• ungathered
• ungeared
• ungenerous
• ungentle
• ungentlemanlike
• ungentlemanly
• ungetatable
• unglamorous
• unglamourous
• unglazed
• ungodliness
• ungodly
• ungovernable