- any of up to seven energy levels on which an electron may exist within an atom, the energies of the electrons on the same level being equal and on different levels being unequal.
- a group of nucleons of approximately the same energy.
- a scab on the surface of an ingot.
- a length of unfinished tubing.
- a pierced forging.
- a hollow object made by deep drawing.
verb (used with object)
verb (used without object)
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Origin of shell
OTHER WORDS FROM shellshell-less, adjectiveshell-like, adjectivede-shell, verb (used with object)
Words nearby shell
Definition for shell (2 of 2)
usage note for she'll
Example sentences from the Web for shell
Israeli media have reported on company’s links to shell companies and byzantine deals.The man who built a spyware empire says it’s time to come out of the shadows|Bobbie Johnson|August 19, 2020|MIT Technology Review
Then they begin to burn hydrogen in a shell surrounding the center.
An empty shell of a man stumbled into a ramshackle Pentecostal church at 3585 Middlefield Road looking to be filled with the Holy Spirit.
I just know everybody has shell shock from the crisis learning that we did when we closed schools, and everybody had to start online.North County Report: School Reopening Tensions Are High in Oceanside|Kayla Jimenez|July 22, 2020|Voice of San Diego
The virus can infect human cells, and delivers DNA instructions for making the coronavirus’ spike protein — the knobby protein studding the virus’s outer shell.COVID-19 vaccines by Oxford, CanSino and Pfizer all trigger immune responses|Tina Hesman Saey|July 21, 2020|Science News
Their friends noticed, and asked Sabrine to talk to him to bring him out of his shell a little.
Another said just the act of spending money on self-improvement made him determined to break out of his shell.
Yet five years later, the news operation has vanished and TRN is now a shell of its former self.
That August, she and Camp co-wrote the first Marcel the Shell video.The Casual Genius of Jenny Slate: ‘Marcel the Shell,’ ‘Obvious Child,’ and the Ghost of ‘SNL’|Kevin Fallon|October 17, 2014|DAILY BEAST
I think the problem is the scientists who are getting money from Shell Oil and Exxon Mobil.
You see, I've got the thick part of a snail's shell in my tooth and the minute that is out I'll be all right.'The Club at Crow's Corner|James Otis
It mostly consisted of how the inner man should be sustained, and of anecdotes of agility in avoiding shot and shell.South Africa and the Transvaal War, Vol. IV (of 6)|Louis Creswicke
A "padré" entered, supporting a young officer of the ——, a far worse case of shell shock, and laid him out on the bed.Attack|Edward G. D. Liveing
Whatever the trajectory may be we see that the shell must necessarily arrive in a slanting direction.The Romance of War Inventions|Thomas W. Corbin
Always ready to send shot and shell into a bulging speck in the sky that does not return the luminous signals.
British Dictionary definitions for shell (1 of 2)
- a class of electron orbits in an atom in which the electrons have the same principal quantum number and orbital angular momentum quantum number and differences in their energy are small compared with differences in energy between shells
- an analogous energy state of nucleons in certain theories (shell models) of the structure of the atomic nucleus
Derived forms of shellshell-less, adjectiveshelly, adjective
Word Origin for shell
British Dictionary definitions for shell (2 of 2)
Scientific definitions for shell
- The usually hard outer covering of certain animals, such as mollusks, insects, and turtles.
- The hard outer covering of a bird's egg.
- The hard outer covering of a seed, nut, or fruit.
- A set of electron orbitals that have nearly the same energy. Electrons in outer shells have greater energy than those in shells closer to the nucleus. Elements in the Periodic Table range from the lightest elements with electrons normally occupying one shell (hydrogen and helium) to the heaviest, with electrons in seven shells (radium and uranium, for instance). See more at atomic spectrum orbital subshell. See Note at metal.
- Any of the stable states of other particles or collections of particles (such as the nucleons in an atomic nucleus) at a given energy or small range of energies.
Idioms and Phrases with shell
In addition to the idiom beginning with shell
- shell out
- in one's shell