Conjoined twins are a rare medical phenomenon where two infants are physically joined together, sharing one or more vital organs. There are various synonyms for the term conjoined twins, including Siamese twins, named after Chang and Eng, the famous conjoined twins from Siam (now Thailand). Other synonyms include conjoined siblings, conjoined brothers or sisters, and symmetrical twins. Medical terms for conjoined twins include parasitic twins, which refer to an incomplete, asymmetrical twin, and dicephalic parapagus, which involves twins joined at the head with two distinct brains but shared body parts. Despite their rare occurrence, conjoined twins have fascinated people for centuries and have inspired countless stories and works of art.