"terabytes" in the noun sense
1. terabyte, TB
a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes
2. terabyte, tebibyte, TB, TiB
a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes
Source: WordNet® (An amazing lexical database of English)
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