femtoelectronvolt

noun

A unit of energy equal to one quadrillionth of an electronvolt, symbol feV

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Meanings

nounfemtoelectronvolt (plural femtoelectronvolts)

plural femtoelectronvolts

  1. natural sciencesA unit of energy equal to one quadrillionth of an electronvolt, symbol feV

Origin

From femto- + electronvolt.

Full word history & related roots →
Cite this entry
APA

femtoelectronvolt. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/femtoelectronvolt

MLA

“femtoelectronvolt.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/femtoelectronvolt. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “femtoelectronvolt,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/femtoelectronvolt.

Source: femtoelectronvolt on Wiktionary, CC BY-SA 4.0.