1) Abnormal condition 2) Abnormalcy 3) Abnormality 4) Congenital absence of a heart 
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) ... 
(a-kahr´de-ә) a developmental anomaly consisting of absence of the heart.
Type: Term Pronunciation: ā-kar′dē-ă Definitions: 1. Congenital absence of the heart; a condition sometimes occurring in one member of monozygotic twins or in one member of conjoined twins when one partner monopolizes the placental blood supply; can also occur in triplet pregnancies.
Acardia is the condition of a person born without a heart.
[n] - congenital absence of the heart (as in the development of some monsters)
acardia Without a heart; having no heart.
noun congenital absence of the heart (as in the development of some monsters)
congenital absence of a heart.