1. The state or quality of being abnormal. 2. An anomaly, deformity, malformation, impairment, or dysfunction.
figure-of-8 a. a radiographic appearance associated with total anomalous drainage of the pulmonary venous circulation into enlarged right and anomalous left venae cavae, that produces a globular density above the heart; the silhouette suggests the figure 8. See snowman a.snowman a;
snowman a. figure-of-8 a
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