Wordnet 3.0
NOUN (1)
1. 
 a unit of information equal to 1024 mebibits or 2^30 (1,073,741,824) bits; 
[syn: gibibit, Gibit]
WordNet (r) 3.0 (2006):
gibibit
    n 1: a unit of information equal to 1024 mebibits or 2^30
         (1,073,741,824) bits [syn: gibibit, Gibit]