Headless may refer to:

Science and technology

Medicine

* Acephalic acardia, a type of

twin reversed arterial perfusion Twin reversed arterial perfusion sequence, also called TRAP sequence, TRAPS, or acardiac twinning, is a rare complication of monochorionic twin pregnancies. It is a severe variant of twin-to-twin transfusion syndrome (TTTS). In addition to the tw ...

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 Anencephaly is the absence of a major portion of the brain, skull, and scalp that occurs during embryonic development. It is a cephalic disorder that results from a neural tube defect that occurs when the rostral (head) end of the neural tube fai ...

, 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, software capable of working on a device without a

graphical user interface The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...

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 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 Ginny Holder is an actress best known for playing Thandie Abebe-Griffin on the BBC medical drama series ''Holby City ''Holby City'' (stylised on-screen as HOLBY CIY) is a British medical drama television series that aired weekly on BBC On ...

* Headless, a foe in '' Ultima'' * Headless, NPCs in ''

The Matrix Online ''The Matrix Online'' (abbreviated as ''MxO'') was a massively multiplayer online role-playing game (MMORPG) initially developed by Monolith Productions and later, a few months after launch, by Sony Online Entertainment. It was advertised as a ...

'' * ''Headless'' (film), a 2015 horror film by Arthur Cullipher *

Headless (band) Headless is an Italian hard rock band, founded in 1996 in Avezzano by Walter Cianciusi. Their music is characterized by the fusion of AOR and progressive metal. After having released an E.P. and a full-length album in 2000 the band suspended an ...

, 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 ''Flying in a Blue Dream'' is the third studio album by guitarist Joe Satriani, released on October 30, 1989 through Relativity Records. It is one of Satriani's most popular albums and his second highest-charting release to date, reaching No. 23 o ...

'' * "Headless", a song by Hella from the album ''Tripper''

Literature and myths

Headless line An acephalous or headless line is a variety of catalectic line in a poem which does not conform to its accepted metre, due to the first syllable's omission. Acephalous lines are usually deliberate variations in scansion, but this is not always obvio ...

, a form of catalexis omitting an initial syllable *

Headless men Various species of mythical headless men were rumoured, in antiquity and later, to inhabit remote parts of the world. They are variously known as ''akephaloi'' (Greek ἀκέφαλοι, "headless ones") or Blemmyes ( la, Blemmyae; gr, βλέμ ...

, a mythical headless humanoid creature * Headless Horseman (disambiguation) {{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 ...