acephalia

Noun
  1. Absence of the head (as in the development of some monsters) (synset 114042912)
    is a type of: abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies
    is a part of: monster, teras - (medicine) a grossly malformed and usually nonviable fetus
    same as: acephalism, acephaly

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