conjoined twin
Noun: - One of a pair of identical twins born with their bodies joined at some point: A conjoined twin is one individual from a set of twins who are physically connected to each other at birth. This rare condition occurs when a single fertilized egg only partially separates to form two individuals.
The term is a medical and anatomical descriptor. It is used in clinical, scientific, and general discussions about this specific congenital condition. - The doctors prepared for the complex surgery to separate the conjoined twins. - The museum exhibit included historical information on famous conjoined twins Chang and Eng Bunker.
- Technical/Scientific Context: The term is precise and neutral. More specific medical terms describe the point of union (e.g., thoracopagus for twins joined at the chest).
- The conjoined twins were diagnosed as craniopagus, meaning they were joined at the head.
- Siamese twin (noun): An older, now often considered outdated or insensitive, term for a conjoined twin. It originates from Chang and Eng Bunker (1811–1874), who were from Siam (now Thailand).
- Twin (noun): One of two children or animals born at the same birth.
- Siamese twin (historical/dated synonym)
The term specifically refers to identical (monozygotic) twins who are physically joined. It is not used for fraternal (dizygotic) twins. The condition is also known as "dicephalic parapagus" or "thoracopagus" depending on the specific anatomy, but "conjoined twin" is the general, encompassing term.
- one of a pair of identical twins born with their bodies joined at some point