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car·di·nal (kahrґdĭ-nəl) [L. cardinalis, from cardo a hinge] 1. of primary or preeminent importance. 2. in embryology, pertaining to the main venous drainage.Medical dictionary. 2011.
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car·di·nal (kahrґdĭ-nəl) [L. cardinalis, from cardo a hinge] 1. of primary or preeminent importance. 2. in embryology, pertaining to the main venous drainage.Medical dictionary. 2011.