cardinal
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car·di·nal
(kar'di-năl),Chief or principal; in embryology, relating to the main venous drainage.
[L. cardinalis, principal]
cardinal
/car·di·nal/ (kahr´dĭ-n'l)1. of primary or preeminent importance.
2. in embryology, pertaining to the main venous drainage.
cardinal
[kär′dənal]
Etymology: L, cardo, hinge
pertaining to something so fundamental that other things hinge on it, such as a cardinal trait that influences one's total behavior.