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Circulation. (Science: physiology) movement in a regular or circuitous course, as the movement of the blood through the heart and blood vessels. Origin: L. Circulatio. Please contribute to this project, if you have more information about this term feel free to edit this page.
(blÊd) n. 1. the red fluid that circulates through the heart, arteries, and veins of vertebrates, consisting of plasma in which red blood cells, white blood cells, and platelets are suspended. 2. a comparable circulating fluid in many invertebrates. 3. the vital principle; life.