omphalosite(redirected from placental parasitic twin)
the underdeveloped parasitic member of pair of monochorionic twins, joined to the more developed member (autosite) by the vessels of the umbilical cord and not capable of sustaining life after separation from the placenta.
Underdeveloped twin of allantoidangiopagous twins; joined by umbilical vessels.
Synonym(s): placental parasitic twin
[omphalo- + G. sitos, food]