longitude
1. [ noun ] (geography) an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
Synonyms: line_of_longitude meridian
Examples:

"all points on the same meridian have the same longitude"

Related terms: great_circle magnetic_meridian prime_meridian dateline observer's_meridian
Similar spelling:   longitudinal
  longtime
  long-term
  long_time
  Longstreth
  Longstreet
  long_suit
  Longtin