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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Underdeveloped twin of allantoidangiopagous twins; joined by umbilical vessels.
Synonym(s): placental parasitic twin
[omphalo- + G. sitos, food]
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