What is an X-ray image of blood vessels, made using a contrast dye, called?

What is an unraveling line in a nylon stocking called? What is an unreasonable fear or hatred of foreigners called? Which word describes an unsophisticated young woman, or a play's young heroine? Which French playwright wrote "Tartuffe", the 1664 comedy about a religious hypocrite? Xenophon's "Anabasis" chronicles the long retreat of Greek mercenaries after fighting for Prince Cyrus of which empire? Which anarchist was deported to Russia in 1919 along with Alexander Berkman, only to find life there no better? Which president was shot while greeting the public in a receiving line at the 1901 Pan-American Exposition? Anatoly Karpov was world champion of which game from 1975 until he lost to Garry Kasparov in 1985?