| syncephalus | Conjoined twins having a single head with two bodies. See: conjoined twins. Compare: craniopagus, janiceps. Synonym: monocephalus, monocranius. Origin: syn-+ G. Kephale, head (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) |