fermi

¹ American  

[fur-mee, fer-mee] / ˈfɜr mi, ˈfɛr mi /

noun

Physics.

1. a unit of length, 10− 15 m, used in measuring nuclear distances. F

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Fermi ² American  

[fur-mee, fer-mee] / ˈfɜr mi, ˈfɛr mi /

noun

1. Enrico 1901–54, Italian physicist, in the U.S. after 1939: Nobel Prize 1938.

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fermi ¹ British  

/ ˈfɜːmɪ /

noun

1. a unit of length used in nuclear physics equal to 10 ^–15 metre

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Fermi ² British  

/ ˈfɜːmɪ, ˈfɛrmi /

noun

1. Enrico (enˈriːko). 1901-54, Italian nuclear physicist, in the US from 1939. He was awarded a Nobel prize for physics in 1938 for his work on radioactive substances and nuclear bombardment and headed the group that produced the first controlled nuclear reaction (1942)

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Fermi Scientific  

/ fĕr′mē /

1. Italian-born American physicist who won a 1938 Nobel Prize for his research on neutrons. In 1942, with Leo Szilard, Fermi built the world's first nuclear reactor. He also discovered over 40 new isotopes, including the element fermium, which is named for him.

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Etymology

Origin of fermi

Named after E. Fermi

Example Sentences

Why is it that the electron seems to have no size other than its wavelength, while the proton and neutron are about 1 fermi in size?

From Textbooks • Aug. 12, 2015

First, we must calculate the time Δt that the pion exists, given that the distance it travels at nearly the speed of light is about 1 fermi.

From Textbooks • Aug. 12, 2015

I. Dimmi, dimmi, o trovatore, Tu che canti sul l�uto, Bello e bruno e pien d'amore Dalla valle in su venuto, Non ti fermi sull' altura Per mostrar la tua bravura?

From Love Letters of a Violinist and Other Poems by Mackay, Eric

I reserve for you some canti fermi and antiphons, which I wrote down at the time, and my little book describes the order of the various services and the meaning of the different ceremonies.

From Letters of Felix Mendelssohn Bartholdy from Italy and Switzerland by Mendelssohn-Bartholdy, Felix

Dovete essere di buono animo et stare constanti et fermi: et perdere la vita insieme con la libert� che � meglo allo huomo uso a essere libero, essere morto che essere servo.

From Notes and Queries, Number 78, April 26, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc by Bell, George