atto-
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.at·to-
combining form \ˈa-(ˌ)tō\Definition of ATTO-
: one quintillionth (10−18) part of <attogram>
Origin of ATTO-
International Scientific Vocabulary, from Dan or Norwegian atten eighteen, from Old Norse āttjān; akin to Old English eahtatīene eighteen
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