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

femto-

combining form

/femtəʊ/

/femtəʊ/

(specialist)

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(in units of measurement) 10-15
- a femtosecond
Word Originfrom Danish or Norwegian femten ‘fifteen’.

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See femto- in the Oxford Advanced American Dictionary

Check pronunciation: femto-

Nearby words

noun

From the Word list

B2

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