Wordnet 3.0
ADJECTIVE (1)
1. 
 involving or relating to three dimensions or aspects; 
 giving the illusion of depth; 
- Example: "lifelike three-dimensional characters"- Example: "a three-dimensional account of conditions under the new government"- Example: "they shot the movie in three-D"[syn: three-dimensional, 3-dimensional, third-dimensional, three-d]
WordNet (r) 3.0 (2006):
3-dimensional
    adj 1: involving or relating to three dimensions or aspects;
           giving the illusion of depth; "lifelike three-dimensional
           characters"; "a three-dimensional account of conditions
           under the new government"; "they shot the movie in
           three-D" [syn: three-dimensional, 3-dimensional,
           third-dimensional, three-d]