line of longitude

Noun
  1. An imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator (synset 108616379)
    "all points on the same meridian have the same longitude"
    is a type of: great circle - a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center
    subtypes:
    • observer's meridian - a meridian that passes through the observer's zenith
    • prime meridian - meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
    • magnetic meridian - an imaginary line passing through both magnetic poles of the Earth
    specific instances: date line, dateline, international date line - an imaginary line on the surface of the earth following (approximately) the 180th meridian
    same as: meridian

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