siamese twin(n = noun.person) conjoined twin - one of a pair of identical twins born with their bodies joined at some point;
is a kind of identical twin, monozygotic twin, monozygous twin

blue point siamese, conjoined twin, dizygotic twin, fraternal twin, identical twin, monozygotic twin, monozygous twin, siamese, siamese cat, twin, twin bed, twin bill, twin cities, twin falls, twin towers