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Definition of atto- combining form from the Oxford Advanced Learner's Dictionary

atto-

combining form
 
/ætəʊ/
 
/ætəʊ/
(specialist)
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  1. (in units of measurement) a factor of 10-18
    • 200 attowatts
    Word Originfrom Danish or Norwegian atten ‘eighteen’.
See atto- in the Oxford Advanced American Dictionary
Check pronunciation: atto-

Nearby words

trait
noun
 
 
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