Jisho

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Noun, Prefix
1. tera-; 10^12
Wikipedia definition
2. Tera-Tera- is a prefix in the metric system denoting 10 or 1000000000000. The prefix tera was confirmed in 1960. In computer science tera can sometimes mean 1099511627776 (2) instead of 1000000000000, especially in the term terabyte. To avoid this ambiguity, the binary prefix tebi has been introduced to signify 2.
Read “Tera-” on English Wikipedia
Read “テラ” on Japanese Wikipedia
Read “Tera-” on DBpedia

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