{{Wiktionary}} '''Shell''' or '''Shells''' may refer to: {{TOC right}}
==Architecture and design== * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses
==Science== ===Biology=== * Seashell, a hard outer layer of a marine animal, found on beaches * Eggshell * Nutshell * Exoskeleton, an external covering of some animals ** Mollusc shell *** Bivalve shell *** Gastropod shell ** Shell, of a brachiopod * Turtle shell * Armadillo shell
===Physics and chemistry=== * Electron shell or a principal energy level of electrons outside an atom's nucleus * Nuclear shell model, a principal energy level of nucleons within an atom's nucleus * On shell and off shell, quantum field theory concepts depending on whether classical equations of motion are obeyed
===Mathematics=== * Spherical shell, between two concentric spheres
==Organisations== * Shell plc formerly Royal Dutch Shell plc, a British multinational oil and gas company ** Shell Oil Company or Shell USA ** Shell Australia ** Shell Canada ** Shell Nigeria * Shell corporation, a type of company that serves as a vehicle for business transactions
==Computing== * Shell (computing), a type of user interface and command-line interpreter ** Command-line interface, sometimes referred to as command shell ** List of command-line interpreters, programs occasionally referred to as shells ** Web shell, interface that enables a web server to be remotely accessed ** Unix shell, a shell for Unix-like operating systems ** Shell script, a computer program designed to be run by a shell ** Bash (Unix shell) ** Bourne shell * Read–eval–print loop, also known as a language shell * Shell account, a user account on a remote server * Secure Shell, cryptographic network protocol * Shellsort or Shell sort, a sorting algorithm by Donald Shell * Shell, an empty expert system
==Entertainment== * ''Shell'' (2012 film), an independent drama film * ''Shell'' (2024 film), an American thriller film * Shell (theater), a curved surface for reflecting sound * The Shells, a musical group * "Shell (Of a Man)", a song by Saya Gray from ''SAYA'', 2025 * "Shells" (''Angel''), a TV episode * "The Shell" (''The Amazing World of Gumball''), a TV episode * Shell, a receptacle used in the Shell game * "Shell", a song by Arrested Development from ''Zingalamaduni''
==Places== * Shell, Ecuador * Shell, Worcestershire, England * Shell, Wyoming, United States * Shell Lake (disambiguation), several places
==Weaponry== * Shell (projectile), an explosive device fired from artillery * Shotgun shell, a type of shotgun ammunition
==Persons with the surname Shell== * Art Shell (born 1946), American football player and coach * Brandon Shell (born 1992), American football player * Donald Shell (1924–2015), American computer scientist * Donnie Shell (born 1952), American football player * George Shell (disambiguation) * Karl Shell (born 1938), American economist * Rita Shell (1863–1950), British magazine editor
==Other uses== * Racing shell, a watercraft * Shell (machinery), each half of a two-piece plain bearing <!-- * A ring-like algebraic structure notability? --> * Coverage shell, the number of defenders guarding the deep portion of the field in American football *Conchiglie, a type of pasta
==See also== * Shell suit, a descendant of the tracksuit * Shel, a given name * Shels (disambiguation) * {{lookfrom}} * {{intitle}}
{{disambiguation|geo|surname}} sv:Skal