antimeridian

From anti- +‎ meridian.

antimeridian (plural antimeridians)

1. (geography) The reference line at 180° longitude, on the opposite side of earth to the prime meridian.

   Synonym: Greenwich antimeridian

   • 2015, Simon Guerrier, Dr. Marek Kukula, The Scientific Secrets of Doctor Who, Random House, →ISBN:

     On the opposite side of the Earth from Greenwich is the antimeridian, a line of longitude that is 180° both east and west of the prime meridian. It cuts through parts of eastern Russia, the Fiji Islands and the middle of the Pacific Ocean.

2. (geography) A meridian of longitude opposite to any given meridian used as a point of reference.

   123° west is the antimeridian of the 57° east meridian.

   • 2006, William Millar, The Amateur Astronomer's Introduction to the Celestial Sphere, Cambridge University Press, →ISBN, page 24:

     The antimeridian contains your nadir and the opposite celestial pole for your hemisphere. The local meridian and the antimeridian together form the great circle simply called the meridian.

   • 2017, Charles W. J. Withers, Zero Degrees: Geographies of the Prime Meridian, Harvard University Press, →ISBN, page 183:

     Other prime meridians were presented as candidates for the world's baseline: Jersualem; Ferro; Kamchatka; the mid-Atlantic; the Bering Strait; and Greenwich's antimeridian.

• antipode

Borrowed from French antiméridien.

antimeridian n (plural antimeridiane)

1. antimeridian

• antimeridian in Academia Română, Micul dicționar academic, ediția a II-a, Bucharest: Univers Enciclopedic, 2010. →ISBN