fermi
(noun)
/ˈfɛr.mi/
Definitions
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A unit of length equal to one femtometer, or 10⁻¹⁵ meters, used in nuclear physics.
A fermi is a whisper of distance in the theater of atoms, a leap into the heart of the cosmos where protons dance on the edge of nothingness.Example: The radius of a proton is approximately 0.85 femtometers, or 0.85 fermi.
Origin
Named after Italian physicist Enrico Fermi, who made significant contributions to nuclear physics.
Synonyms
femtometer