Headless

Being headless is acrania, the failure of an individual animal to develop a head, despite belonging to a species that normally does so.

Headless or Acrania may also refer to:

Science and technology

Medicine

• Acephaly (medicine), a condition where a headless lower body can live if not detached from the body of its more normal twin
• Decapitation, the severing of the whole head from the body

Computing

• 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
• Headless browser, a web browser without a graphical user interface

Linguistics

• Headless phrase, a term in linguistics for a phrase with no head

Geology

• Headless Formation, a geologic formation in Northwest Territories

Media and pop culture

• 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
• Acrania (band), a Mexican experimental death metal band
• Headless (band), an Italian hard rock band
• Mike the Headless Chicken (non-fiction), a Wyandotte chicken that lived for 18 months after his head had been cut off

Literature

• Blemmyes (legendary creatures), a headless humanoid creature
• Headless Horseman (disambiguation)