- 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.
Origin of shell
OTHER WORDS FROM shellshell-less, adjectiveshell-like, adjectivede-shell, verb (used with object)
Words nearby shell
Other definitions for shell (2 of 2)
usage note for she'll
How to use shell in a sentence
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.
If you tend to inhale your food without realizing how much you consumed, opt for nibbles like in-shell pistachio nuts.12 Thanksgiving Weight Loss Tips That Actually Work|DailyBurn|November 27, 2014|DAILY BEAST
Then came the day Mustafa, along with two others, was killed by a mortar shell.
Yet five years later, the news operation has vanished and TRN is now a shell of its former self.
Off flew the shell, seven miles it flew; over the Turkish Army from one sea into another.
He conducts this ceremony with the greatest solemnity, occasionally pronouncing these incantatory words, "Plate or shell, sah?"Physiology of The Opera|John H. Swaby (AKA "Scrici")
Fancy that enormous shell dropping suddenly out of the blue on to a ship's deck swarming with troops!
From pre-natal days I was destined for the railway service, as an oyster to its shell.
If one could languish through life in the shell of a mere beauty that life would be a good deal simpler proposition than it is.Ancestors|Gertrude Atherton
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.
Other Idioms and Phrases with shell
In addition to the idiom beginning with shell
- shell out
- in one's shell