conjoined twinBrE /kənˌdʒɔɪnd ˈtwɪn/ 🔊NAmE /kənˌdʒɔɪnd ˈtwɪn/ 🔊 noun (specialist) (also ˌSiamese ˈtwin) one of two people who are born with their bodies joined together in some way, sometimes sharing the same organs 联体儿