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n. Angular distance on the earth's surface, measured east or west from the prime meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds.

n. Celestial longitude.

n. Angular distance measured west or east of the prime meridian.

n. Any imaginary line perpendicular to the equator and part of a great circle passing through the North Pole and South Pole.

n. Length.

adj.

n. Length; measure or distance along the longest line; -- distinguished from breadth or thickness; ; rare now, except in a humorous sense.

n. The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris. The longitude of a place is expressed either in degrees or in time

n. The distance in degrees, reckoned from the vernal equinox, on the ecliptic, to a circle at right angles to the ecliptic passing through the heavenly body whose longitude is designated.

n.

n. Length; measure along the longest line.

n. In geography, the angle at the pole contained between two meridians, one of which, called the first or prime meridian, passes through some conventional point from which the angle is measured.

n. In astronomy, the arc of the ecliptic measured eastward from the vernal equinoctial point to the foot of the circle of latitude drawn through the object, as a star or other point on the sphere whose position is in question. See circle of latitudes, under circle.

n. the angular distance between a point on any meridian and the prime meridian at Greenwich

"In the days before global positioning satellites, a chronometer - a super-accurate clock - was used to help ascertain longitude on the seas."

breadth    thickness   

angular distance   

geocentric    celestial longitude    circle of longitude    mean longitude    longitude star    longitude rime    libration in longitude   

length    place    distance    meridian   

latitude    meridian    equator    deg    coordinates    azimuth    declination    altitude    elevation    bearing