Conjoined twins with a single head and neck and separate bodies below the thoracic level. ... See: conjoined twins. ... Origin: G. Dere, neck, + adelphos, brother ... (05 Mar 2000) ... 
(der″ә-del´fәs) malformed twins fused at or near the navel and having one head.
Type: Term Pronunciation: dār′ă-del′fŭs Definitions: 1. Conjoined twins with a single head and neck and separate bodies below the thoracic level.
deradelphus Conjoined twins with a single head and neck and separate bodies below the thoracic level.