meridian
Definition
Imaginary semi-circle joining the earth's poles, and crossing the equator and all latitudes (baselines) at right angles. All meridians traverse in north-south direction and their ends converge at north and south poles. Meridian lines are used as one of the reference points (coordinates) with baselines in land surveying grid system to locate any point on earth. Also called longitude.
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meridian is in the Shipping, Transport, & Travel subject.
meridian appears in the definitions of the following terms: baseline, longitude and Greenwich mean time (GMT)
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