Involving or relating to three dimensions or aspects; giving the illusion of depth(adjective)
Having a three-dimensional form or appearance(noun)
A movie with images having three dimensional form or appearance(noun)
WordNet. Princeton University. 2010.
Use "three-d" in a sentence
"They had the wit to act appealing, like the beasts we have all come to know and love through the medium of the three-d tapes."
"I'm not paying $15 to see a computer's rendition of an old man's face in three-d."
"Possum, my high-school roommate was obsessed with stereoscopes and three-d (part of a lifelong project to write stereoscopic software to help people understand how to visualize n-dimensional space in three dimensions), and would build his own by drawing two nearly identical images and sticking them on the ends of paper-towel rolls, then putting the rolls up to his eyes and unfocusing his vision until the image converged."