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Definitions of longitude:
  • noun:   an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
    Example: "All points on the same meridian have the same longitude"



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Alternative Terms
latitude meridian prime-meridian royal-greenwich-observatory international-date-line ecliptic-coordinate-system degree greenwich england perpendicular latus eratosthenes nicaea circumference terrified-2 dead-reckoning seagoing zenith caller infrequent huygens-probe pendulum-clock-2 imprecise deviation unpredictable unsuitable gif watchmaker chronometer worldmaplonglat-eq-circles-tropics-non-png map earth-disambiguation horizontal-plane circle-of-latitude equator northern-hemisphere southern-hemisphere geographic-coordinate-system greek-alphabet-2 lambda east west angle great-britain london-2005-film el-hierro rome copenhagen jerusalem-british-band saint-petersburg pisa paris928-musical philadelphia-wordnet washington-capital-washington-dc 1884 international-meridian-conference minute-of-arc sexagesimal decimal radian pi cartesian-coordinate-system north-pole nautical-mile mile foot-unit-of-length trigonometric-function coordinated-universal-time time-zone marine-chronometer universal-time equation-of-time great-circle cartography celestial-navigation daughter-star spanish-armada gulf-stream age-of-discovery 1600s 1700s giovanni-domenico-cassini 1681 galileo-galilei galilean-moons dava-sobel early-history-of-minnesota-golden-gophers-football shovell-sir-clowdisley longitude-prize rupert-gould board-of-longitude cornwall english-channel portsmouth caribbean bridgetown barbados astronomical-transit occultation 19th-century