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Word of the Day Wednesday, June 10, 2026

femtosecond

/fɛmˈtoʊsɛnd/ noun · British & US
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What does femtosecond mean?

noun

A unit of time equal to one quadrillionth of a second, used in physics to measure extremely short time intervals.

Example

"The scientists used a femtosecond laser to study the behavior of molecules in a chemical reaction."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for femtosecond

Antonyms of femtosecond

Rhymes with femtosecond

Etymologically related