Conjoined twins having a single head with two bodies. See conjoined twins, under twin. Cf.:craniopagus, janiceps. SYN: monocephalus, monocranius. [syn- + G. kephale, head]
- s. asymmetros SYN: janiceps asymmetrus.
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syn·ceph·a·lus (sin-sefґə-ləs) [syn- + -cephalus] conjoined twins with one head and a single face with four ears, two on the back of the head.Medical dictionary. 2011.