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Definition of Acardia
1. Noun. Congenital absence of the heart (as in the development of some monsters).
Medical Definition of Acardia
1. Congenital absence of the heart; a condition sometimes occurring in monozygotic twins or in the smaller, parasitic member of conjoined twins when its partner monopolises the placental blood supply. Acardia can also occur in triplet pregnancies. Origin: G. A-priv. + kardia, heart (05 Mar 2000)