Pulmonary embolism is the sudden blockage of a major blood vessel (artery) in the lung, usually by a blood clot . In most cases, the clots are small and are not deadly, but they can damage the lung. But if the clot is large and stops blood flow to the lung, it can be deadly.
The term chiaroscuro (from the Italian words chiaro, meaning light, and scuro, meaning dark) refers to the use of light and shade in a work of art to define three-dimensional objects. Masters of this technique were the Italians Leonardo da Vinci and Caravaggio and the Dutch painter Rembrandt.
chiaroscuro (plural chiaroscuros or chiaroscuri) ( 1 art) An artistic technique developed during the Renaissance, referring to the use of exaggerated light contrasts in order to create the illusion of volume. ( 2 art) A monochrome picture made by using several different shades of the same color.