antimeridian

English Wikipedia has an article on:

180th meridian

Wikipedia

From anti- +‎ meridian.

antimeridian (plural antimeridians)

(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.
(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.

the reference line at 180° longitude, on the opposite side of earth to the prime meridian

	indefinite	definite	indefinite	definite
	singular		plural
nominative-accusative	antimeridian	antimeridianul	antimeridiane	antimeridianele
genitive-dative	antimeridian	antimeridianului	antimeridiane	antimeridianelor
vocative	antimeridianule		antimeridianelor

English