Reference meaning
zepto-
Last updated
In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth).
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This definition is reproduced from English Wiktionary, sense en-zepto--en-prefix-en:Q110807, under the CC BY-SA 4.0. It has not yet received VocabularyBase editorial review. Read the source and license details.