A helix (pl: helixes or helices) is a type of smooth space curve, i.e. a curve in three-dimensional space. It has the property that the tangent line at any point makes a constant angle with a fixed line called the axis. Examples of helices are coil springs and the handrails of spiral staircases.
What is a 'Tight Monetary Policy'. Tight monetary policy is a course of action undertaken by the Federal Reserve to constrict spending in an economy that is seen to be growing too quickly or to curb inflation when it is rising too fast.
Photo: Deborah Harrison/Getty Images. Definition: Expansionary monetary policy is when a central bank, such as the Federal Reserve, uses its tools to stimulate the economy. The effect is an increase in the money supply, lower interest rates, and a rise in overall aggregate demand.