| dicephalus | Symmetrical conjoined twins with two separate heads. See: conjoined twins. Synonym: bicephalus, diplocephalus. Origin: G. Di-, two, + kephale, head (05 Mar 2000) |
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| dicephalus diauchenos | A dicephalus with separate necks. Synonym: derodidymus. (05 Mar 2000) |
| dicephalus dipus dibrachius | A dicephalus in which the merging of the bodies has obliterated the appendages on the side of the union, leaving only two arms and two legs for the double body. (05 Mar 2000) |
| dicephalus dipus tetrabrachius | A dicephalus with two legs and four separate arms. (05 Mar 2000) |
| dicephalus dipus tribrachius | A dicephalus with two legs and three arms. (05 Mar 2000) |
| dicephalus dipygus | Anacatadidymus Conjoined twins united in the middle but separated above and below. Synonym: dicephalus dipygus. Origin: G. Ana, up, + kata, down, + didymos, twin (05 Mar 2000) |
| dicephalus monauchenos | A dicephalus in which fusion has involved the cervical region so that the two heads are on a single neck. (05 Mar 2000) |