antiworld

anti- +‎ world

antiworld (plural antiworlds)

1. (astrophysics) A hypothetical world constructed from antimatter.
   • 1975, Sputnik, number 7:

     But possibly there is an antiworld in which, in addition to matter, time is also negative. […] In such an antiworld man would grow younger with time and a broken glass would come together from its fragments.

   • 1982, Rudolʹf Konstantinovich Balandin, Vladimir Vernadsky:

     It follows that somewhere antiworlds consisting of antiparticles are bound to wander. No traces of these antiworlds have as yet been found.

   • 1988, Stephen Hawking, A Brief History of Time: From the Big Bang to Black Holes, page 75:

     There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands!

• antiplanet