What does "tebibyte" mean?

Strictly, 2⁴⁰ (1024⁴, or 1,099,511,627,776) bytes or 2¹⁰ (1024) gibibytes, as opposed to a terabyte.

What is a synonym for "tebibyte"?

Common synonyms include: tib, tb, terabyte.

Pronounced //ˈtɜbɪˌbaɪt//.

/ˈtɜbɪˌbaɪt/ noun

noun ·Rare ·Advanced level

Noun

1
Strictly, 2⁴⁰ (1024⁴, or 1,099,511,627,776) bytes or 2¹⁰ (1024) gibibytes, as opposed to a terabyte.
2
a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes wordnet

From tebi- + byte.