An omphalosite lacking head and upper limbs, and with a defective thorax; typically, the body consists of little more than pelvis and lower limbs.
[per- + G. a- priv. + kephalē, head]
Farlex Partner Medical Dictionary © Farlex 2012
peracephalus(pĕr″ă-sĕf′ă-lŭs) [″ + Gr. a-, not, + kephale, head]
A parasitic placental twin. It does not contain a head or arms, and the thorax is malformed.
Medical Dictionary, © 2009 Farlex and Partners