Submitted by György Chityil ... on Fri, 01/19/2018 - 18:28 Hierarchy: PrefixDescription: In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10<sup>?12</sup>. Symbol: pNgram: pico-Ngram Text: pico-Source: WiktionaryIssue: 0Ngram Count: 1