acephaly

Thân thiện

A newborn lamb exhibits acephaly in a veterinary textbook diagram.

Definition

Noun: * A congenital absence of the head: A severe and fatal birth defect in which a fetus or newborn lacks a head or a major portion of the skull and brain. This condition is a type of cephalic disorder.

Usage

• The term is a technical, medical term used primarily in teratology (the study of congenital abnormalities) and pathology.
• It describes a specific, severe malformation present at birth.
• Example: "The prenatal ultrasound revealed a severe anomaly, leading to a diagnosis of acephaly."
• Example: "In teratology, acephaly is classified as an extreme form of anencephaly."

Advanced Usage

• The condition is sometimes discussed in historical or ethical contexts regarding the study of congenital disorders.
• Example: "Historical medical texts sometimes used the term acephaly to describe certain monstrous births."

Variants and Related Words

• Acephalic (adjective): Describing something or someone lacking a head.
  • Example: "The specimen was described as acephalic."
• Acephalus (noun): An individual or fetus affected by acephaly.
• Anencephaly (noun): A related but more common neural tube defect where a major part of the brain, skull, and scalp fails to develop. Acephaly is considered a more extreme form.

Synonyms

• Acephalia (noun): A direct synonym.
• Headlessness (noun): A non-technical, descriptive term.

Notes

• This is a highly specialized and rare term not used in everyday language.
• It is derived from the Greek prefix (meaning "without" or "not") and (meaning "head").

Học thuật

Noun

1. absence of the head (as in the development of some monsters)

Từ đồng nghĩa

• acephalia
• acephalism