Headless may refer to:

Science and technology

Medicine

* Acephalic acardia, a type of twin reversed arterial perfusion in which one twin is born without a head *

Acrania Acrania is a rare congenital disorder that occurs in the human fetus in which the flat bones in the cranial vault are either completely or partially absent. The cerebral hemispheres develop completely but abnormally. The condition is frequently, ...

, missing cranial bones * Anencephaly, absence of a major part of the brain and skull *

Decapitation Decapitation or beheading is the total separation of the head from the body. Such an injury is invariably fatal to humans and most other animals, since it deprives the brain of oxygenated blood, while all other organs are deprived of the i ...

, the severing of the whole head from the body

Computing

In computing and software, headless can either refer to software or servers without a graphical interface, or software platforms that decouple front- and back-end components. *

Headless system A headless computer is a computer system or device that has been configured to operate without a monitor (the missing "head"), keyboard, and mouse. A headless system is typically controlled over a network connection, although some headless system ...

, a server with no monitor, keyboard, or mouse attached *

Headless software Headless software (e.g. "headless Java" or "headless Linux",) is software capable of working on a device without a graphical user interface. Such software receives inputs and provides output through other interfaces like network or serial port an ...

, software capable of working on a device without a graphical user interface *

Headless browser A headless browser is a web browser without a graphical user interface. Headless browsers provide automated control of a web page in an environment similar to popular web browsers, but they are executed via a command-line interface or using netwo ...

, a web browser without a graphical user interface *

Headless CMS A headless Content Management System, or headless CMS, is a back end-only web content management system that acts primarily as a content repository. A headless CMS makes content accessible via an API for display on any device, without a built-in ...

, a backend-only content management system that employs APIs to display content

Linguistics

* Headless phrase, a term in linguistics for a phrase with no

head A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may ...

Geology

Headless Formation The Headless Formation is a Formation (geology), geologic formation in Northwest Territories. It preserves fossils dating back to the Devonian Period (geology), period. See also * List of fossiliferous stratigraphic units in Northwest Territorie ...

, a geologic formation in Northwest Territories

Arts and entertainment

* ''Headless'' (TV series) a British television series starring Patrick Robinson and Ginny Holder * Headless, a foe in '' Ultima'' * Headless, NPCs in '' The Matrix Online'' * ''Headless'' (film), a 2015 horror film by Arthur Cullipher * Headless (band), an Italian hard rock band *

Mike the Headless Chicken Mike the Headless Chicken (April 20, 1945March 17, 1947) was a male Wyandotte chicken that lived for 18 months after his head had been cut off. After the loss of his head, Mike achieved national fame until his death in March 1947. In Fruita, C ...

(non-fiction), a Wyandotte chicken that lived for 18 months after his head had been cut off * "Headless", a song by Joe Satriani from his album '' Flying in a Blue Dream'' * "Headless", a song by Hella from the album ''Tripper''

Literature and myths

* Headless line, a form of catalexis omitting an initial syllable * Headless men, a mythical headless humanoid creature *

Headless Horseman (disambiguation) The Headless Horseman is a fictional character that appears in many venues. Headless Horseman may also refer to: * Headless Horseman ("Legend of Sleepy Hollow"), a character in the 1820 short story "The Legend of Sleepy Hollow" by Washington Irvi ...

{{disambiguation *

Headless Horseman The Headless Horseman is a mythical figure who has appeared in folklore around the world since the Middle Ages. The figure is traditionally depicted as a rider upon horseback who is missing his head. Description Depending on the legend, the Hor ...