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Wiktionary
tebibit

n. 240 (1,099,511,627,776) bits, as opposed to a terabit. Symbol Tib.

Wikipedia
Tebibit

The tebibit is a multiple of the bit, a unit of information, prefixed by the standards-based multiplier tebi (symbol Ti), a binary prefix meaning 2. The unit symbol of the tebibit is Tibit.

1 tebibit = 2 bits = = 1024 gibibits

The tebibit is closely related to the terabit, the corresponding unit using the metric prefix tera, which is 10 bits.