from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Either of a pair of congenitally joined twins (Siamese twin) united at the xiphoid process.

from The Century Dictionary and Cyclopedia

  • n. In teratology, a double monster connected by a band extending from the ensiform cartilage to the umbilicus. The Siamese twins constituted a xiphopagus. Also xiphodidymus.


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