Wordnet 3.0
NOUN (1)
1. 
 twin skyscrapers 110 stories high in New York City; 
 built 1368 feet tall in 1970 to 1973; 
 destroyed by a terrorist attack on September 11, 2001; 
[syn: World Trade Center, WTC, twin towers]
WordNet (r) 3.0 (2006):
WTC
    n 1: twin skyscrapers 110 stories high in New York City; built
         1368 feet tall in 1970 to 1973; destroyed by a terrorist
         attack on September 11, 2001 [syn: World Trade Center,
         WTC, twin towers]
V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
WTC
       Windows Terminal Controller