cephalo-, cephal-, -cephalic, -cephalism, -cephalous, -cephaly

Congenital absence of the head and arms or upper limbs: "The veterinarian was puzzled by the birth of the pig that was born with abrachiocephalia."

A fetus exhibiting the absence of the head and arms.

1. The absence of a head; having no head: "The strange lizard appeared to be an acephalia because its head was difficult to discern."
2. Having no leader, ruler, or government head: "After the political rebellion, the nation experienced a period of acephalia before a new leader was chosen."

Denoting members of the protozoan suborder Acephalina (order Eugregarinida), characterized by simple noncompartmentalized bodies, that parasitize invertebrates.

The absence of the head and arms which is present at birth, but not necessarily hereditary: "The research department at the hospital studied the unusual congenital condition of acephalobrachia."

Congenital absence of head and hands; a condition that is acquired during fetal development and present at birth: "At the university, research was being conducted about the condition of acephalochiria, another congenital condition."

A fetus exhibiting acephalostomia.

The congenital absence of the head, yet with a kind of mouth on the superior aspect.

Not having a head or a clearly defined head: "The Australian lizard has been the most acephalous lizard in the desert."