Share this entry

Share this page

fermi

Syllabification: fer·mi
Pronunciation: /ˈfermē, ˈfər-
 
/

Definition of fermi in English:

noun (plural same)

A unit of length equal to 10−15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton.
Example sentences
  • In order to fuse two hydrogen nuclei together, though, we must force another proton into the hydrogen atom within a distance of 1 fermi from the atom's proton.
  • About half a century later, Robert Hofstadter won the 1961 Nobel Prize in physics for his work verifying that the radius of an atomic nucleus is about one fermi.
  • It acts between two neutrons, between two protons, or between a neutron and a proton, as long as they are no farther apart than a distance of one fermi.

Origin

early 20th century: named after E. Fermi (see Fermi, Enrico).

Definition of fermi in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day emulous
Pronunciation: ˈɛmjʊləs
adjective
seeking to emulate someone or something