Siamese twin
conjoined twin

Sang-hyun and Dong-hyun were born as conjoined twins with two heads sharing one body.

The two actresses work together beautifully, often as close as conjoined twins, expressing the presence in each of us of a younger, more innocent self who walks with us through maturity.

Smith and Weston are two conjoined twins, joined by the head.

This, however, is as rare as conjoined twins, and only happens to one out of every 100,000 live births.

During this time Powell attempts to extract information from her subconscious, but is blocked by strange images including one of her and Reich as conjoined twins.

Priyamani was recruited to enact dual roles as conjoined twins in a film loosely based on the Thai horror film Alone.

They were born as conjoined twins even though Eileen was not expecting twins at the time.

Sometimes an embryo started as conjoined twins, but one twin degenerated completely except for one or more limbs, which end up attached to the other twin.

Many additional body parts form by the same process as conjoined twins: the zygote begins to split but fails to completely separate.

Rather, he said that as conjoined twins, the boys had developed a nonverbal form of communication that they no longer used.