1. lacking a head or having no distinct head
Usage: technical or scientific usage
2. lacking leadership or central authority
Usage: figurative

Examples

• The acephalic worm has no brain or head structure.
• Some ancient organisms were acephalic, with nerve clusters distributed throughout their bodies.
• The protest movement remained acephalic, with no single spokesperson.
• Acephalic organizations sometimes struggle with decision-making.
• Certain marine creatures are acephalic by design.