| cephalothoracopagus asymmetros | A form of cephalothoracopagus in which only one of the faces is well developed. Synonym: cephalothoracopagus asymmetros. (05 Mar 2000) |
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| syncephalus asymmetros | A janiceps with one very small and imperfectly developed face. Synonym: iniops, syncephalus asymmetros. (05 Mar 2000) |
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| cephalothoracopagus | Conjoined twins with the bodies fused in the cephalic and thoracic regions. See: conjoined twins. Origin: cephalo-+ G. Thorax, chest, + pagos, something fixed (05 Mar 2000) |
| cephalothoracopagus disymmetros | A form of cephalothoracopagus with the fused head showing equally developed faces directed laterally. (05 Mar 2000) |
| cephalothoracopagus monosymmetros | A form of cephalothoracopagus in which only one of the faces is well developed. Synonym: cephalothoracopagus asymmetros. (05 Mar 2000) |