Definitions

1. noun

A person who is conjoined at the head, specifically two individuals sharing a portion of the brain and often joined at the head.

“The twins were born conjoined at the head, a rare occurrence known as craniopagus.”

2. adjective

Describing something that is conjoined at the head, such as conjoined twins.

“The doctors specialized in the treatment of craniopagus twins, a rare and complex condition.”