What does femtometer mean?
Femtometer means US spelling of femtometre..
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Pronunciation varies by accent · noun
US spelling of femtometre..
Use femtometer when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Femtometer means US spelling of femtometre..
Common synonyms include femtometre, fermi.
The opposite depends on the specific sense.
Use femtometer where its definition matches the intended context.
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