Etymology
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terabyte (n.)

by 1982, from tera- + byte.

updated on July 17, 2012

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Definitions of terabyte from WordNet

terabyte (n.)
a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes;
Synonyms: tb
terabyte (n.)
a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes;
Synonyms: tebibyte / tb / TiB
From wordnet.princeton.edu, not affiliated with etymonline.