Congenital absence of the heart; a condition sometimes occurring in one member of monozygotic twins or in one member of conjoined twins when pair partner monopolizes the placental blood supply; can also occur in triplet pregnancies. [G. a- priv. + kardia, heart]
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n.
congenital absence of the heart. The condition may occur in conjoined twins; the twin with the heart controls the circulation for both.
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acar·dia (a-kahrґde-ə) [a-1 + Gr. kardia heart] congenital absence of the heart.Medical dictionary. 2011.