tri-D

• (noun) tri-di, tri-dee, tridee

tri-D (plural tri-Ds)

1. (science fiction) Synonym of tri-V (“a system capable of recording or displaying three-dimensional video”).
   • 2016, Jamie Sawyer, Origins, New York, N.Y.: Orbit, →ISBN, page 245:

     Photos of smaller versions of him — I guessed his children — lined the ultra-modern furniture; as I swept a hand over a cabinet, a couple of tri-Ds even came to life.

tri-D (not comparable)

1. (science fiction) Three-dimensional.
   • 2007, Keith R. A. DeCandido, Star Trek: Corps of Engineers: Aftermath, page 452:

     They were still engaged in their mental game of tri-D chess, whispering moves back and forth when they assumed Captain Gold wasn't listening.

• Jesse Sheidlower, editor (2001–2025), “tri-D, n.”, in Historical Dictionary of Science Fiction.

• DIRT, dirt