Siamese twin

Siamese twin Word Origin noun

1. (not in technical use) conjoined twin.

Origin of Siamese twin First recorded in 1820–30; named after congenitally united twins, Chang and Eng (1811–74), born in Siam, who were joined to each other at the chest Related Words for siamese twin likeness, reciprocal, double, clone, look-alike, corollary, companion, counterpart, duplicate, mate, ringer, coordinate, doppelganger, match siamese twin in Medicine Siamese twin [sī′ə-mēz′] n.

1. Either of a pair of conjoined twins. No longer in technical use.