parasitic twin

(redirected from Acardiac twin)
Also found in: Wikipedia.

par·a·sit·ic twin

the smaller of unequal conjoined twins.

parasitic twin

The smaller of a pair of conjoined twins, when there is a marked disparity in size.
See also: twin
References in periodicals archive ?
Since the acardiac twin would not survive," reported the surgeons in the Massachusetts case, "the incision for separation was performed far toward her side of the fusion plane so that her tissue could be used to achieve complete closure of the ventral defect in the surviving twin.