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.
Theorbo or Chitarrone. A theorbo, also sometimes called a chitarrone, is a lute with a long neck extension. A theorbo has two pegboxes, one at the top of the fingerboard and the other at the end of the extension. The extended neck is necessary because, before the invention of wire-wound strings, increasing the length was the only way to obtain a clear and sustained sound from low bass strings.