A creature or organism that is born without a head or proper head development, or used generally for headless things in biological classification.
Direct from Latin/Greek 'acephalus,' meaning without head. Used as both a descriptive term and a name for specific organisms or conditions in zoological and medical contexts.
Nature actually produces acephali—anencephalic human fetuses and some fish with reversed development patterns exist, reminding us that the absence of a head is a real biological phenomenon, not just philosophical theory.
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