Flood Stage. 1  The term stage refers to the height of a river (or any other body of water) above a locally defined elevation. This locally defined elevation is a reference level, often referred to as datum. 2  When the discharge of a river increases, the channel may become completely full.
vasoconstrictor (vÄÂ´zÅkÉnstrikÂ´tur) , n (vasopressor), an agent that causes a rise in blood pressure by constricting the blood vessels. In local areas, it causes constriction of the arterioles and capillaries. Vasoconstrictor agents. 2  vasoconstrictor center. 3  vasoconstrictor center. 4  vasoconstrictor center. 5  vasoconstrictor center. 6  vasoconstrictor fibers. 7  vasoconstrictor fibers. 8  vasoconstrictor fibers. 9  vasoconstrictor nerve. 10  vasoconstrictor nerve.
Quick Answer. Peripheral vasoconstriction is the constriction of peripheral blood vessels. When constriction of blood vessels occurs, the diameter of the blood vessel decreases, causing a decrease in blood flow. Continue Reading.