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femtometer
[fem-tuh-mee-ter]
noun
Physics.
fermi. fm
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Word History and Origins
Origin of femtometer1
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The detectors must also squelch other vibrations to stabilize the length of each arm to 1 femtometer, the width of a proton.
Read more on Science Magazine
Pohl and his team were surprised to find a lower value for the radius, pegging it at 0.84 femtometer—well outside the range of potential sizes established by earlier measurements.
Read more on Scientific American
The surprise was an answer that was 4 percent smaller, 0.84184 femtometer.
Read more on New York Times
Putting these techniques together gave an answer of about 0.8768 femtometer for the proton’s radius, just less than a quadrillionth of a meter.
Read more on New York Times
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