| 释义 |
Siamese twins
Siamese twins pl n (Pathology) non-technical name for conjoined twins [C19: named after a famous pair of conjoined twins, Chang and Eng (1811–74), who were born in Siam]Si′amese twins′
n.pl. twins who are congenitally joined together. [1820–30; alluding to Chang and Eng (1811–74), twins born in Siam who were joined in this way] TranslationsSiamese twins
Siamese twins: see conjoined twinsconjoined twins,
congenitally united organisms that are complete or nearly complete individuals, historically known as Siamese twins. They develop from a single fertilized ovum that has divided imperfectly; complete division would produce identical twins, having the same sex and
..... Click the link for more information. .Siamese twins[′sī·ə‚mēz ′twinz] (medicine) Viable conjoined twins. Siamese twinsEng and Chang (1814–74), the original pair, were connected at the chest. [Medical Hist.: Brewer Dictionary, 828]See: TwinsSiamese twins
Siamese twins [si″ah-mēz´] twins" >monozygotic twins whose bodies are joined. The connection may be slight or extensive; it may involve skin and muscles or cartilage of a limited region, such as the head, chest, hip, or buttock, or the twins may share an organ, such as an intestine or parts of the spine. If joined superficially, the twins may be easily separated by surgery soon after birth. If more deeply united, they may have to go through life with their handicap, if they survive. New techniques in surgery are making it possible to separate some Siamese twins whose physical links are highly complex. Called also conjoined twinsSi·a·mese twinsoriginally, a much-publicized conjoined pair of twins (xiphopagus) born in Siam (present-day Thailand) in the 19th century; this term has since come into general lay usage for any type of conjoined twins, but is incorrect.A joined gestational product resulting from a failure in division of the yolk sac or delayed monovular separation. Conjoined twins occur in ±1:200,000 term deliveries; most are joined at the chest—thoracopagus
Prognosis Depends on the need for or adequacy of surgical separation'Siamese' twins Conjoined equal twins A joined gestational product due to a failure in division of the yolk sac or due to delayed monovular separation; STs occur in ±1:200,000 term deliveries; most are joined at the chest–thoracopagus Prognosis Depends on adequacy of surgical separationSi·a·mese twins (sī'ă-mēz' twinz) A much publicized pair of conjoined twins born in Thailand (then Siam) in the 19th century; this term has since come into general lay usage for any type of conjoined twins. Siamese twins Identical (monozygous) twins that have failed fully to separate after the first division of the ovum and remain partially joined together at birth. The junction is usually along the trunk or between the two heads. From the male twins, Chang and Eng, born in Siam in 1811.Siamese twins, named for Eng and Chang (1811-1874) who were born in Siam (now Thailand).ThesaurusSeeSiamese twin |