Wordnet 3.0
NOUN (1)
1. 
 a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes; 
[syn: terabyte, tebibyte, TB, TiB]
WordNet (r) 3.0 (2006):
TiB
    n 1: a unit of information equal to 1024 gibibytes or 2^40
         (1,099,511,627,776) bytes [syn: terabyte, tebibyte,
         TB, TiB]